Document Number: 102NMAN0003

Revision Number: G
Aircraft Serial
Number:

63354 POWELL BUTTE ROAD

BEND, OR 97701, USA
800- 547-2558
www.precsieflight.com

Instructions for Continued Airworthiness

Cirrus SR22/SR22T Built-In Oxygen System

STC Number SA01708SE

NOTICE
The Airworthiness Limitations Section (Section 2.6) is FAA Approved and specifies maintenance
required under Sections 43.16 and 91.403 of the Federal Aviation Regulations, unless an
alternative program has been FAA Approved.

These documents must be kept with the aircraft records.

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF THE PRECISE FLIGHT, INC.

(PFI) COMPANY, AND ITS RECEIPT OR POSSESSION DOES NOT CONVEY ANY RIGHTS TO
REPRODUCE, DISCLOSE ITS CONTENTS, OR TO MANUFACTURE, USE, OR SELL
ANYTHING IT MAY CONTAIN OR DESCRIBE IN ANY WAY. REPRODUCTION, DISCLOSURE,
OR USE WITHOUT SPECIFIC PRIOR WRITTEN CONSENT OF PFI IS STRICTLY PROHIBITED.

FAA Approval Date: 1/31/2017 Page 1 of 36

 63354 POWELL BUTTE ROAD Document
BEND, OR 97701 102NMAN0003
Number:
800- 547-2558
www.preciseflight.com Revision Number: G

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System

REVISION HISTORY
Approved Approved
Rev. DESCRIPTION OF CHANGES Author Date
By Date
- Original Release STP 9/7/2006 JNS 9/7/2006
A Revised document to include remote filler, and JNS 9/27/2006 JNS 9/27/2006
final oxygen system wire routing. FAA 10/3/2006
B Revised document to include the A5 constant JNS 4/27/2007 JNS/FAA 7/23/2007
flowmeter, the PreciseFlow® Oxygen Conserver,
added Section 2.7.1 inspection checklist for ease
of maintenance, updated wire schematics adding
the remote Annunciator option, added Section
3.0 IPC to this document for ease of
maintenance for Cirrus Customers and Service
Centers.
C Added section 2.4.7 for either ground or flight JNS 2/8/2008 JNS 2/8/2008
testing of the O2 Required Pressure Sensor,
added a ground test procedure for sensor test,
allowed the owner/pilot to perform the 50, 200,
and 500hr inspections on the breathing
equipment. Corrected typo on item 1, Figure 19
for the Bottle Assembly. Added Trouble Shooting
Flow Charts figures 5-11.
D Removed owner/pilot notes for 50, 200, and JNS 3/21/2008 JNS 3/21/2008
500hr inspections on the breathing equipment as
required per the FAA. Corrected page
numbering error do to formatting.
E Updated ICA for Cirrus Perspective Installations; W. Ashforth 2/22/10 CRB 2/23/10
Added new SR22T model throughout document;
changed Hydrostatic pressure test to every 5 yrs.
(was: 3 yrs.);
F Added 5 port manifold data, changed CPC O-ring R. Norris 5/27/2011 CRB 6/22/11
service interval to 5 years, removed A4 from IPC,
corrected typos.
G Corrected typo in table 1 of section 2.7. Updated
system wire diagram section 2.8. Added
051A0330-2 to BOM section 3.7.3. Added J. Noland
02/04/2016 CRB 02/15/2016
102N0420-2 to BOM section 3.8 fig 25. Added R. Norris
102N0401 (3.8.1) to section 3.8. Added renamed
conserver X3 to all sections.

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 63354 POWELL BUTTE ROAD Document
BEND, OR 97701 102NMAN0003
Number:
800- 547-2558
www.preciseflight.com Revision Number: G

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
TABLE OF CONTENTS
Revision History ......................................................................................................................... 2
Table of Contents ...................................................................................................................... 3
1.0 Overview.............................................................................................................................. 5
1.1 Purpose ............................................................................................................................ 5
1.2 ICA Revisions ................................................................................................................. 5
2.0 Instructions for Continued Airworthiness ............................................................................. 6
2.1 Introduction ...................................................................................................................... 6
2.2 System Description .......................................................................................................... 6
2.3 Special Tools Required .................................................................................................... 8
2.4 Maintenance Instructions ................................................................................................. 8
2.4.1 Bottle Removal and Replacement ................................................................................. 8
2.4.2 Filler Station Cleaning ................................................................................................... 9
2.4.3 Line Cleaning ................................................................................................................ 9
2.4.4 Functional Test ...................................................................................................... 9
2.4.5 Oxygen System Installation.................................................................................. 10
2.4.6 Oxygen System Bleed-Down (Purging) ............................................................... 10
2.4.7 Oxygen Required Pressure Calibration Check..................................................... 10
2.4.7.1 Flight Test (Method A) ...................................................................................... 11
2.4.7.2 Ground Test (Method B) ................................................................................... 11
2.5 Trouble Shooting Guide ................................................................................................. 13
2.5.1 Oxygen System Fails to Operate ......................................................................... 13
2.5.2 Oxygen System Trouble Shooting Flow Chart ..................................................... 13
2.5.3 Additional Technical Assistance........................................................................... 17
2.6 Airworthiness Limitations ............................................................................................... 17
2.7 Scheduled Maintenance Intervals and Overhaul Intervals for Inspections for Continued
Airworthiness ....................................................................................................................... 18
2.7.1 Scheduled Maintenance Checklist ....................................................................... 19
2.8 System Wiring Diagram ................................................................................................. 22
................................................................................................................................................ 23
3.0 Illustrated Parts Catalog .................................................................................................... 24
3.1 Purpose .......................................................................................................................... 25
3.2 Overview ........................................................................................................................ 25
3.3 Breathing Stations .......................................................................................................... 25
3.3.1 Constant Flow Breathing Equipment .................................................................... 25
3.3.2 PreciseFlow or X3 Demand Flow Breathing Equipment ...................................... 26
3.4 Overhead Distribution Manifold Installation .................................................................... 27
3.5 Oxygen Low Pressure Line Installation .......................................................................... 28
3.6 Oxygen Bottle Installation .............................................................................................. 29
3.7 Display/Logic Assembly Installation ............................................................................... 30
3.7.1 Display and Controller Installations - Standard Installation ......................................... 30
3.7.2 Display and Controller Installations - Ribbon Cable ................................................... 31
3.7.3 Display and Controller Installation – Cirrus Perspective ............................................. 32
3.7.4 OPTIONAL – Remote Annunciator (OPTIONAL) ........................................................ 33
3.8 Filler Port and Line Installation ....................................................................................... 34
3.8.1 Alternate Filler Port and Line Installation..................................................................... 35
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BEND, OR 97701 102NMAN0003
Number:
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www.preciseflight.com Revision Number: G

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
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 63354 POWELL BUTTE ROAD Document
BEND, OR 97701 102NMAN0003
Number:
800- 547-2558
www.preciseflight.com Revision Number: G

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System

1.0 OVERVIEW
1.1 PURPOSE
The Built-In Oxygen System (“Oxygen System” or “System”), is installed to provide supplemental
oxygen for the pilot and passengers. The System consists of the following:
1. A 77 cu Ft. composite wrapped cylinder mounted in the aft fuselage of the aircraft
2. An oxygen regulator which is connected to the bottle and contains:
a. An overpressure discharge
b. A high pressure transducer
3. A Remote Filler Assembly located in the aft center of the baggage compartment and contains:
a. A service port for filling the Oxygen System
b. A manual pressure gauge
4. Associated plumbing and fittings
5. A center console panel display and System actuation switch
6. An overhead distribution manifold with low pressure transducer and integrated interior LED
dome light
7. Breathing devices and flowmeters with cannulas, or masks
Setting the oxygen switch to ON illuminates the display showing oxygen quantity and energizes the
System to allow oxygen to reach the overhead distribution manifold. Additionally the System
annunciates if oxygen should be used in the aircraft as well as oxygen pressure or electrical faults.
Four (4) or five (5) manually operated oxygen flowmeters or PreciseFlow or X3 Oxygen Conservers can
be connected to the oxygen distribution manifold. The flow controls are calibrated and adjustable for
altitude by the user. The following flow controls can be one of the following:
 A4 Flowmeters and Standard or Oxygen Conserving Cannulas -- Up to 18,000 Ft.
 A4 Flowmeters and Masks (Standard and Microphone) -- Up to 25,000 Ft.
 A5 Flowmeters and Standard or Oxygen Conserving Cannulas – Up to 18,000 Ft.
 A5 Flowmeters and Masks (Standard and Microphone) – Up to 25,000 Ft.
 PreciseFlow or X3 Oxygen Conserver with Dual Lumen Cannula – Up to 18,000 Ft.
 PreciseFlow or X3 Oxygen Conserver with Masks (Standard and Microphone) – Up to 25,000 Ft.

1.2 ICA REVISIONS

To ensure the maintenance of your existing aircraft, possible revisions to Section 2.0 Instructions for
Continued Airworthiness may require updating over the life of the aircraft. Per the applicable Federal
Aviation Regulations, an update process is required to properly maintain these instructions in addition
to the aircraft itself. Because of this, it is imperative to complete the registration card for the aircraft
once the System has been installed.
Revisions can be made by a service letter from Precise Flight Inc., an Airworthiness Directive as issued
by the Administrator, by single page updates, or by a complete replacement of all pages of the manual.
It must be clearly noted as to the revision level of the pages listed in the List of Active Pages. If a single
sheet(s) is replaced, replace the List of Active Pages with the new one provided, or update the list
manually and initial and date the list.

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 63354 POWELL BUTTE ROAD Document
BEND, OR 97701 102NMAN0003
Number:
800- 547-2558
www.preciseflight.com Revision Number: G

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
2.0 INSTRUCTIONS FOR CONTINUED AIRWORTHINESS
2.1 INTRODUCTION
The contents of this section provide the instructions for continued airworthiness for the Cirrus
SR22/SR22T Built-In Oxygen System. The majority of the installation does not affect the standard
airworthiness of the aircraft; only the key Oxygen System items that exist different are noted in this
section. All structure and general maintenance must be performed in accordance with existing
approved maintenance practices, the aircraft maintenance manual or other FAA Approved
document(s).

2.2 SYSTEM DESCRIPTION

Figure 1 - SR22/SR22T Built-In Oxygen System Overivew

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BEND, OR 97701 102NMAN0003
Number:
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www.preciseflight.com Revision Number: G

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
The Built-In Oxygen System consists of a few simple components for supplying sufficient oxygen to the
crew and passengers of the Cirrus SR22/SR22T aircraft. These components follow:
Oxygen Bottle
– Stores 77 cu Ft. of Oxygen at 1800 psig

Regulator Assembly
– Converts the high bottle pressure to a usable 70 psig for cabin distribution. This is actuated
through a latching solenoid assembly with an electrical connection to the aircraft cockpit. The
regulator assembly allows the bottle to be filled through a separate fill port and a fill gage. The
fill gage allows the maintenance personnel to monitor the fill operation. An overpressure burst
disc is incorporated to dissipate excess pressure and protect the bottle. A high pressure
transducer electrically transmits bottle pressure to the cockpit display.

Oxygen Remote Filler Station

– Allows for easy filling of the oxygen system and incorporates a manual pressure gage for filling,
and preflight. Located for convenient access through the baggage door on the left hand side of
the aircraft, just above the floor on the center of the baggage compartment aft wall. An easy
access door covers the filler port to prevent damage to the filler from shifting baggage.

Oxygen Distribution Lines and Electrical Wiring Connections

– The oxygen distribution lines allow oxygen to safely enter the aircraft cabin. The electrical
connections allow the bottle and oxygen cabin pressure to be transmitted to the cockpit and for
cockpit selection of oxygen in the aircraft cabin.

Oxygen Distribution Manifold

– Allows the crew and passengers to connect to the Oxygen System with four (4) or five (5) quick
disconnect fittings with the capability of sealing oxygen flow to the cabin when disconnected.

Oxygen System Display and Display-Logic Controller (DLA)

– The Oxygen System display provides control over the oxygen delivery to the aircraft cabin. This
display supports an Annunciator to indicate when oxygen is to be used (above 12,000 Ft. PA)
and an indication of cabin oxygen or electrical actuation fault. The cabin oxygen flashing fault
illuminates if cabin oxygen is not – between 60 psig and 85 psig. The electrical actuation fault
illuminates if there is an electrical short or open circuit to the latching solenoid at the regulator.
The oxygen controller supports these functions and ensures a short duration signal to drive the
latching solenoid.

Breathing Equipment
– The breathing equipment can consist of either constant flow and/or demand flow regulator
breathing stations. Both use a connection to the distribution manifold. Precise Flight A4 or A5
constant flow devices or “Flowmeters” indicate the flow of oxygen with an integral valve to
control the quantity of oxygen reaching the crew or passenger. The PreciseFlow or X3 demand
flow conservers are calibrated and adjusted by the user for altitude to supply oxygen to either
dual lumen cannulas up to 18,000ft, or dual sensing masks. The flow indicator on this flow
device is labeled with appropriate oxygen flow for increasing aircraft altitude. The constant
flowmeter or demand regulator is attached to the appropriate approved mask or cannula to
deliver oxygen to the crew or passengers.

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BEND, OR 97701 102NMAN0003
Number:
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www.preciseflight.com Revision Number: G

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
2.3 SPECIAL TOOLS REQUIRED
-Plastic reservoir hand pump
-Chemical-resistant gloves
-Protective eyewear with side shields

Refer to the installation instructions, or drawings for the Precise Flight Built-In Oxygen System.
2.4 MAINTENANCE INSTRUCTIONS

CAUTION: INSTALL PROTECTIVE COVERS ON ALL OPEN LINES AND COMPONENT FITTINGS
IMMEDIATELY AFTER THEY ARE DISCONNECTED.

Maintain aircraft structure and wiring in accordance with aircraft maintenance manual and FAA
AC43.13.

Precise Flight Inc., www.preciseflight.com, is the approved Overhaul Facility

2.4.1 BOTTLE REMOVAL AND REPLACEMENT

The Built-In Oxygen System bottle removal and replacement procedure follows:

WARNING: OXYGEN SYSTEM MUST BE BLED TO ZERO PSI BEFORE ANY MAINTENANCE.

Bleeding Procedure:
1. Aircraft battery power ON, oxygen display panel ON.
2. Connect Flowmeter breathing device to overhead distribution panel and turn Flowmeter to full
flow until oxygen is purged from the System and the flashing red 200 PSI quantity LED has
been illuminated for 10 minutes and no more oxygen is flowing through the breathing device.
3. Oxygen panel display OFF, aircraft power OFF.

Bottle Removal Procedure:

1. Remove aft fuselage access panel fasteners.
2. Remove and store access panel in a safe location.
3. Detach flexible oxygen line and cap both lines.
4. Disconnect electrical harness.
5. Release the two band clamp restraints.
6. Remove bottle and regulator assembly by first moving the assembly forward and to the left.
Remove bottle and regulator assembly aft end of the bottle first.
7. Installation is opposite of removal – Tighten wing nuts until snug and then two more turns to
ensure proper tension on clamp bolt.
8. Perform a functional system check following installation (purging per next step can be
accomplished during the functional test).
9. Purge the oxygen system by filling the main tank to a minimum of 500psig and bleeding the
system down between 50-100psig by following the bleeding procedure prior to filling the system
for use.

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
2.4.2 FILLER STATION CLEANING
The filler port requires cleaning periodically, and prior to filling, to keep clean of dirt, dust, and oils to
prevent fire.
2.4.3 LINE CLEANING
Line Cleaning Procedure:
1. Preparation
a. Obtain a suitable container for collecting fluid waste.
b. Wear protective gloves and eyewear.
c. Assemble a reservoir pump and drain line, see Fig 1.
2. Flushing
a. Fill 2 qt reservoir with 1% Alconox or Liquinox detergent solution.
www.alconox.com
b. Attach reservoir pump to cabin oxygen line.
c. Pump 2 qt Alconox or Liquinox through oxygen line.
d. Undo pump connection and rinse pump with clear water.
e. Fill 2 qt reservoir with clear tap water.
f. Attach reservoir pump to cabin oxygen line.
g. Pump 2 qt water through oxygen line.
h. Repeat steps A through D, rinsing the pump with the next cleaning material.
i. Pump 1 qt Methyl Alcohol through oxygen line.
j. Pump 1 qt ASAHIKLIN AK-225 through oxygen line. www.agcchem.com
k. Purge the line of AK-225 by passing clean dry air through the line.
l. With the air still flowing, sniff the air exiting the drain line. The absence of odors will
verify the line is free of AK-225.
m. Reconnect lines and restore System to service.

2.4.4 Functional Test

The following test procedure will evaluate the Built-In Oxygen System installation in the aircraft:

1. Check wiring and connections before applying aircraft battery power.

2. Fill Oxygen System with aviators oxygen (see Maintenance Manual or Flight Manual
Supplement), leave access panel open.
3. Switch the Oxygen System ON at the oxygen control panel and verify that the Oxygen System
quantity display indicates the same oxygen pressure shown at the aft fill port gauge.
4. Connect Flowmeter breathing device to overhead distribution panel.
5. Ensure oxygen flow through a breathing device.
6. Switch the Oxygen System OFF at the oxygen control panel.
7. Turn aircraft battery power off.

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BEND, OR 97701 102NMAN0003
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www.preciseflight.com Revision Number: G

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
2.4.5 Oxygen System Installation

Refer to Precise Flight Inc. drawing list 102N0000 Cirrus Design Built-In Oxygen System for installation
and removal of the oxygen system components.

2.4.6 Oxygen System Bleed-Down (Purging)

Use the following procedure to bleed-down the oxygen system should any of the hard lines, non-
conductive line be opened, or bottle removed and re-installed/replaced. This procedure is required to
prevent contamination, or moisture inside the system.

1. Attach the filler line to the filler port, making sure to purge the line prior to attaching to the
aircraft.
2. With the System ON, and flowmeters (or open Connectors) installed in the distribution ports,
initiate flow for 1-2min.
3. Remove the flowmeters from the distribution port, and turn the oxygen System OFF, and fill to
650psig.
4. Perform leak checks as required.
5. Turn the System ON and using flowmeters (or open connectors) installed in the distribution
ports; bleed the system down to below 50psig (but above 0psig).
6. Repeat steps 3-5 once. (Leak check not required on second purge)
7. Remove the flowmeters from the distribution port, and turn the oxygen System OFF, and fill to
1500psig.
8. Perform Final leak check.
9. Fill System to 1800-2000psig as required.
2.4.7 Oxygen Required Pressure Calibration Check

The Precise Flight, Inc. Fixed Oxygen System is designed with an additional safety feature to indicate
O2 is required if the system is off, or there is no pressure at the outlet, when the cabin pressure is at
12,000ft Pressure Altitude (PA). This pressure sensor is internal to the Display Logic Controller (DLA).
To ensure this safety feature is functioning properly a check of its function is required during the annual
inspection. This may be done by a flight test to altitude, or by a ground test.

Note: The Altitude Sensor in the Oxygen System Display Logic Assembly is NOT connected
to the aircraft static system.

Note: Not All aircraft are equipped with a Display Logic Assembly where a test port is
available. In these cases the flight test is the only approved method for testing the
calibration.

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BEND, OR 97701 102NMAN0003
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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
2.4.7.1 Flight Test (Method A)

Method A of checking the calibration is by flight test. This flight is intended to be done during the
maintenance release flight following the annual inspection. The procedure is to fly to 11,000ft PA (alt
setting of 29.92inHg) and during the climb to 12,500ft PA with the oxygen system OFF, note the altitude
which the O2 Required Amber light begins to flash. This should occur between 11,500ft PA and
12,500ft PA if the system is operating normally.

2.4.7.2 Ground Test (Method B)

Method B for checking the calibration is by ground test. The ground test requires the removal of pilots
side Aft Trim Panel to gain access to the Display Logic it Controller (DLA), and is recommended that
this be performed with the seats removed, and the LH (Pilots) side Aft Trim Panel must be removed.

Note: This should be performed during the Cabin Group Inspection as part of the Annual
inspections. In the case of a progressive Maintenance Program, this test should be
accomplished as close to once every year, not to exceed 18months.
Use the flowing procedure for the ground test method for the DLA pressure calibration check:

1. Remove the Pilot Seat if not already removed as part of the annual maintenance check, cabin
group.
2. Remove the LH Aft Trim Panel if not already removed as part of the annual maintenance check,
cabin group to gain access to the DLA. (See Figure 2)

Figure 2 - Location of Oxygen System Display Logic Controler

3. Check general condition of the wiring, and DLA.

4. Remove the Dust Cover/Plug. (See Figure 3)

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System

Figure 3 - Removal of the Dust Cover Plug

5. Using a soft rubber or similar tube with an inside diameter (ID) of 7/64in, connect one end to the
pressure sensor nipple, and the other to the static line on a Pitot-Static Test system with pump.

Figure 4 - Attachment of the Static Test Hose

CAUTION: CARE MUST BE TAKEN DURING THE INSTALLATION AND REMOVAL OF THE 7/64”
INSIDE DIAMETER TUBING TO PREVENT DAMAGE TO THE SENSOR AND/OR THE
CONTROLLER CIRCUIT. DO NOT YANK, OR PULL EXCESSIVELY DURING THE
REMOVAL OR DAMAGE WILL OCCUR AND THE UNIT MUST BE REPLACED.

6. With the aircraft in a safe condition to power up the Main Bus 2, turn ON the main bus 2 with the
oxygen system off.
7. Cycle the system ON and OFF to ensure the system is functioning, use a breathing device to
ensure flow is present. With the system OFF, let the oxygen ‘bleed down’ prior to removing the
breathing device.
8. Using the static portion of the Pitot-Static tester, increase the static altitude slowly to 11,000ft
PA. Continue increasing the altitude and note when the display indicates “O2 required” as
signified on the display by the flashing amber LED. Note the altitude which this occurred.
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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
9. Verify the altitude where the indication first occurred:
a. If indication is between 11,500ft PA and 12,500ft PA, then proceed to the next step.
b. If the indication is outside of this range, re-verify the indication. If the DLA fails a second
time, remove the DLA and replace, or contact PFI for re-adjustment.
10. Turn Aircraft power off.
11. Remove the pressure tubing taking extra care not to damage the DLA pressure transducer.
12. Re-install the dust cover/plug.
13. Note passing test as required.

2.5 TROUBLE SHOOTING GUIDE

2.5.1 Oxygen System Fails to Operate
a. Check circuit breaker.
b. Check connector plugs for security and contact insertion.
c. Check wiring diagram against aircraft installation. See Section 2.8.
d. Check the system function per section 2.5.2.

2.5.2 Oxygen System Trouble Shooting Flow Chart

This section is for reference when troubleshooting the PFI Fixed Oxygen System, if used, and
parts returned, please copy steps taken for reference.

CAUTION: Pressures above 105psig on the low-pressure side will damage the low-pressure
transducer and will require the transducer to be replaced.

Figure 5 –Trouble Shooting FlowChart (6)

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System

Figure 6 - Trouble Shooting Flow Chart (1)

Figure 7 - Trouble Shooting Flow Chart (2 & 8)

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System

Figure 8 - Trouble Shooting Flow Chart (3)

Figure 9 - Trouble Shooting Flow Chart (4)

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System

Figure 10 - Trouble Shooting Flow Chart (5)

Figure 11 - Trouble Shooting Flow Chart (7 & 9)

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
2.5.3 Additional Technical Assistance
Please call Precise Flight, Inc., www.preciseflight.com, 800-547-2558 or 541-382-8684.

2.6 AIRWORTHINESS LIMITATIONS

This Airworthiness Limitations Section is FAA Approved and Specifies
maintenance required under Sections 43.16 and 91.403 of the Federal Aviation
Regulations, unless an alternative program has been FAA Approved.

None – The operation of the Built-In Oxygen System does not impact the airworthiness limitations,
and is not required for normal flight.

Note: To maintain the altitude capability of the aircraft, the Scheduled Maintenance Intervals
and Inspections must be maintained.

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
2.7 SCHEDULED MAINTENANCE INTERVALS AND OVERHAUL INTERVALS FOR INSPECTIONS FOR CONTINUED
AIRWORTHINESS
For this section, the 50hr, 200hr, and 500hr are time of oxygen system in use. Annual and yearly
inspection intervals are calendar intervals. Section 2.7.1 and Table 2 provides a checklist version of
this for maintenance work.
Table 1 - Scheduled Maintenance Intervals and Inspections

15 YEARS
5 YEARS
3 YEARS
ANNUALLY
EACH 500 HOURS OF USE
EACH 200 HOURS OF USE
EACH 50 HOURS OF USE
Cirrus Design SR22/SR22T
BUILT-IN OXYGEN SYSTEM
1. Check flexible lines for security of connections, kinks or tube discoloration.  
2. Replace oxygen cannulas and/or oxygen masks. 
3. Replace or overhaul microphone oxygen mask. 
4. Perform functional test per Section 2.4.3. 
Follow Cirrus Maintenance Manual and this document for general aircraft wiring system checks
and headliner removal. Oxygen Wiring Diagram is in the Appendix.
Check security of oxygen bottle mounting; re-torque wing nuts to snug and two turns tight.
If contamination is found, clean oxygen lines. See 2.4.2.
Check security of oxygen lines, and check bonding continuity on cabin oxygen line to ensure
resistance to aircraft ground is no more than 0.0025Ω (2.5mΩ) between any metal to metal
connections on the System.
Clean and check condition of the filler port and ensure filler cap or rubber pad is present.
Confirm that “O2 REQ’D” annunciator illuminates at 12,000 Ft. ± 500 Ft. Pressure Altitude.
5. Replace O-Ring in CPC Connector Assembly on the breathing stations 
6. Purge Oxygen System. See Maintenance Manual. 
Remove and hydrostatically test the oxygen cylinders from date marked on cylinder.
Overhaul regulator/valve assembly – replace O-Rings, verify regulator pressure setting.
If contamination is found, clean oxygen lines. See 2.4.2.
Inspect oxygen lines and fittings for leaks, cracks or damage. Leak check with Snoop or
equivalent. wwww.swagelok.com.
Replace flexible oxygen lines on breathing stations.
Replace O-Ring in CPC connector assembly identified on the breathing stations.
Overhaul A4 and/or A5 Constant Flowmeters.
7. Replace composite wrapped oxygen cylinder. 
Overhaul regulator/valve assembly – replace O-Rings, verify regulator pressure setting.
Replace non-conductive low-pressure oxygen line between the regulator and the AL hard-lines.
Inspect oxygen lines and fittings for cracks, leaks or damage. Leak check with Snoop or
equivalent. wwww.swagelok.com.
Purge Oxygen System.
Replace flexible oxygen lines on breathing stations.
Replace O-Ring in CPC connector assembly identified on the breathing stations.
Overhaul A4, and/or A5 Constant Flowmeters and PreciseFlow or X3 Demand Conservers.
Notes:
1. Applicable to aircraft with Solid Green (Kevlar) Oxygen Bottle (PFI P/N 026N2001-3)
2. Applicable to aircraft with Striped Green (Carbon) Oxygen Bottle (PFI P/N 026N2003-3)

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
2.7.1 Scheduled Maintenance Checklist
For this section, the 50hr, 200hr, and 500hr are time of oxygen system in use. Annual and yearly
inspection intervals are calendar intervals.
Aircraft
Aircraft Serial Inspection
Registration Total Time Hobbs Time
Number Completion Date
Number

Table 2 - Scheduled Maintainance Checklist

15 Year
Annual

3 Year

5 Year
200hr

500hr
50hr
Item

Inspection Criteria

Breathing Station Group

1 Check Breathing Stations
a) Check tubing connections for security •
b) Check tubing for kinks or discoloration and general
cleanliness
c) Check condition of flowmeters or PreciseFlow or X3
d) Check flow indicator on PreciseFlow or X3 for cracks,
stickiness, general condition
e) Check Cannulas and Masks for general condition,
cleanliness, or discoloration
Initials:______Date:_________
2 Replace Oxygen Cannulas and Standard (Clear) Masks
a) Replace Standard Cannula as required and mark in- •
service date on new part.
b) Replace Oxymizer Cannula as required and mark in-
service date on new part.
c) Replace PreciseFlow or X3 Dual Lumen Cannula as
required and mark in-service date on new part.
d) Replace Standard (Clear) Facemask as required and mark
in-service date on new part.
e) Replace Standard (Clear) PreciseFlow or X3 Facemask as
required and mark in-service date on new part.
Initials:______Date:_________
3 Replace/Overhaul Oxygen Facemasks with Microphone (Blue)
a) Replace or Overhaul Facemask with Microphone (Blue) as •
required and mark in-service date on New or Overhauled
part.
b) Replace or Overhaul PreciseFlow or X3 Facemask with
Microphone (Blue) as required and mark in-service date
on New or Overhauled part.
Initials:______Date:_________
4 Replace O-Rings in CPC connectors on Breathing Stations.
Initials:______Date:_________ •

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
5 Replace/ Overhaul A4 and or A5 Constant Flowmeters and
PreciseFlow or X3 Oxygen Conservers •
a) Replace or Overhaul A4 or A5 Constant Flowmeters as
required and mark in-service date on New or Overhauled
part.
b) Replace or Overhaul PreciseFlow or X3 Oxygen
Conservers as required and mark in-service date on New
or Overhauled part.
c) Replace flexible oxygen lines on breathing stations, part of
replacement or overhaul.
Initials:______Date:_________
Oxygen System Installation Group
6 Functional Check
a) Perform a functional check per section 2.4.4 of this •
document.
Initials:______Date:_________
7 Check Wiring
a) Using the Cirrus Maintenance Manual and this document, •
check the general wiring system including the portion of
the oxygen system behind interior panels.
b) See section 2.8 for oxygen system wiring schematic.
Initials:______Date:_________
8 Check Oxygen System
a) Check the security and condition of the oxygen bottle •
assembly in the tail of the aircraft. If contamination is
found in oxygen lines, clean oxygen lines per section
2.4.3. Normal checks do not require the oxygen lines to
be opened for inspection.
b) Re-torque nuts for bottle mounting to 8in-lbs as required
c) Check the security of oxygen lines and verify electrical
continuity. Must be less than 0.0025Ω (2.5mΩ) between
any connections. IE: tube to fitting, fitting to tube.
d) Clean and check filler port and insure filler cap is present.
Initials:______Date:_________
9 Check Altitude Annunciator (Refer to Section 2.4.7)
a) Verify that the “O2 REQ’D” indicator light on the display •
and if present the “OXYGEN REQUIRED” panel mount
illuminate if the oxygen system is in the OFF position and
the aircraft is at 12,000ft ± 500ft Pressure Altitude.
Initials:______Date:_________
Aircraft with Solid Green (Kevlar) Oxygen Bottle (PFI P/N 026N2001-3)
10 Hydrostatic Test Oxygen Bottle
a) Remove Oxygen Bottle Assembly and return to Precise •
Flight Inc. for Bottle Hydrostatic test and Regulator
Overhaul.
a. Overhaul regulator/valve assembly – Clean
regulator, replace O-Rings, and verify regulator
pressure.
b. Hydrostatic test the bottle and replace as required.
b) Cap oxygen lines to prevent contamination. If oxygen
lines become contaminated, or contamination found, clean
lines per Section 2.4.3 of this report.

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Cirrus Design SR22/SR22T Built-In Oxygen System
c) Re-Install Overhauled Regulator Valve Assembly and New
Bottle.
d) Bleed Down (Purge) Oxygen System per Section 2.4.6.
e) Perform a functional check per section 2.4.4 of this
document.
Initials:______Date:_________
Aircraft with Striped Green (Carbon) Oxygen Bottle (PFI P/N 026N2003-3)
11 Hydrostatic Test Oxygen Bottle
a) Remove Oxygen Bottle Assembly and return to Precise •
Flight Inc. for Bottle Hydrostatic test and Regulator
Overhaul.
a. Overhaul regulator/valve assembly – Clean
regulator, replace O-Rings, and verify regulator
pressure.
b. Hydrostatic test the bottle and replace as required
b) Cap oxygen lines to prevent contamination. If oxygen
lines become contaminated, or contamination found, clean
lines per Section 2.4.3 of this report.
c) Re-Install Overhauled Regulator Valve Assembly and New
Bottle.
d) Bleed Down (Purge) Oxygen System per Section 2.4.6.
e) Perform a functional check per section 2.4.4 of this
document.
Initials:______Date:_________

All Aircraft
12 Replace Oxygen Bottle
a) Remove Oxygen Bottle Assembly and return to Precise •
Flight Inc. for Bottle replacement and Regulator Overhaul.
a. Overhaul regulator/valve assembly – Clean
regulator, replace O-Rings, and verify regulator
pressure.
b) Cap oxygen lines to prevent contamination. If oxygen
lines become contaminated, or contamination found, clean
lines per Section 2.4.3 of this report.
c) Re-Install Overhauled Regulator Valve Assembly and New
Bottle.
d) Bleed Down (Purge) Oxygen System per Section 2.4.6.
e) Perform a functional check per section 2.4.4 of this
document.
Initials:______Date:_________
- End of Checklist -

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
2.8 SYSTEM WIRING DIAGRAM

Figure 12 – Typical System Wire Diagram (Standard Installation)

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Cirrus Design SR22/SR22T Built-In Oxygen System

Figure 13 - OPTIONAL - Remote Annunciator Wire Diagram

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System

Figure 14 - OPTIONAL - Remote Annunciator Wire diagram (Ribbon Cable Installations)

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
3.0 ILLUSTRATED PARTS CATALOG
3.1 PURPOSE
This section is not FAA accepted or FAA Approved and is for information only to aid in the
maintenance and ordering replacement parts for the Precise Flight Built-In Oxygen System.

3.2 OVERVIEW
See Figure 1 for system overview picture.

3.3 BREATHING STATIONS

This section lists the replacement breathing station equipment available for the Cirrus
SR22/SR22T Built-In Oxygen System.

3.3.1 Constant Flow Breathing Equipment

NOTE:
The original Precise Flight, Inc. A4 Constant Flowmeter has been replaced by the A5 Constant Flowmeter
for replacement parts. The Masks and Cannulas are interchangeable between the Constant Flow Meters
Only.

1
2

4
Figure 15 - Replacement Constant Flow Breathing Equipment

Fig. Item PFI Part Number* Nomenclature Effective

Figure 15 1 027N0003-1 A5 Flowmeter with CPC Connector All
Figure 15 2 020N0001-1 Oxymizer Cannula All
Figure 15 3 020N0002-1 Face Mask All
Figure 15 4 020N0005-1 Face Mask with Microphone “Blue” All
* Or equivalent foreign language version.
PFI Kit Part Qty. PFI Part
Fig. Item Nomenclature
Number Number
027N0305-1 - - - - A5 Assembly with Cannula - Face Mask, CPC, Kit
Figure 15 1 1 027N0003-1 A5 Flowmeter with CPC Connector
Figure 15 2 1 020N0001-1 Oxymizer Cannula
Figure 15 3 1 020N0002-1 Face Mask
027N0306-1 - - - - A5 Assembly with Cannula – Face Mask with
Microphone, CPC, Kit
Figure 15 1 1 027N0003-1 A5 Flowmeter with CPC Connector
Figure 15 2 1 020N0001-1 Oxymizer Cannula
Figure 15 4 1 020N0005-1 Face Mask with Microphone “Blue”

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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
3.3.2 PreciseFlow or X3 Demand Flow Breathing Equipment
NOTE:
The Cirrus Built-In Oxygen System requires the PreciseFlow or X3 with CPC and
In-Line Regulator. The PFI Semi-portable oxygen systems use a different
pressure and are not compatible with the Built-In Oxygen System.

2
1

3 4

Figure 16 - Replacement PreciseFlow Demand Breathing Equipment

Fig. Item PFI Part Number* Nomenclature Effective

Figure 16 1 027N1002-1 Conserver and Inline Regulator Assembly, CPC All
Figure 16 2 020N0050-1 Conserver (Dual Lumen) Cannula All
Figure 16 3 020N0060-1 Conserver Face Mask All
Figure 16 4 020N0070-1 Conserver Face Mask with Microphone All
* Or equivalent foreign language version.
PFI Kit Part Qty. PFI Part
Fig. Item Nomenclature
Number Number
027N1101-6 - - - - Conserver with Cannula/Face Mask, Inline
Regulator Kit
Figure 16 1 1 027N1002-1 Conserver and Inline Regulator Assembly, CPC
Figure 16 2 1 020N0050-1 Conserver (Dual Lumen) Cannula
Figure 16 3 1 020N0060-1 Conserver Face Mask
027N1102-6 - - - - Conserver with Cannula/Microphone Face Mask,
Inline Regulator, Kit
Figure 16 1 1 027N1002-1 Conserver, Inline Regulator Assembly, CPC
Figure 16 2 1 020N0050-1 Conserver (Dual Lumen) Cannula
Figure 16 4 1 020N0070-1 Conserver Face Mask with Microphone

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Cirrus Design SR22/SR22T Built-In Oxygen System
3.4 OVERHEAD DISTRIBUTION MANIFOLD INSTALLATION

4
5
6

7
8

Cirrus Headliner requires

modification per Precise
Flight Inc Drawing 1
102N0222
2

Figure 17 – Overhead Distribution Manifold

Fig. Item PFI Part Number Nomenclature Effective

Figure 17 1 102N0221-1 Manifold Trim Ring All
Figure 17 2 HD 07091 #4 Black Oxide Washer All
Figure 17 3 HD 07090 4-40 x 3/8 Button Head Cap Screw, Black Oxide All
Figure 17 4 EL 03046 Copper Foil Tape, Tin Plated 4” All
CDC 50379-002
Figure 17 5 NAS1329A3-80 Insert All
Figure 17 6 102N0232-1 4 port Manifold and Bracket Assembly 4 port A/C
OR
102N0235-1 5 port Manifold and Bracket Assembly 5 port A/C
Figure 17 7 MS 35335-32 #10 Ext. Star Lock Washer All
Figure 17 8 AN525-10R7 10-32 x 7/16 Washer Head Machine Screw All

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Cirrus Design SR22/SR22T Built-In Oxygen System

3.5 OXYGEN LOW PRESSURE LINE INSTALLATION

Part of Item 4

4 7

2
1

Figure 18 - Low Pressure Line Installation

Fig. Item PFI Part Number Nomenclature Effective

Figure 18 1 102N0253-1 Flexible Tubing Sub-Assembly All
Figure 18 2 HD 07107 Fitting, Reducing Union All
Figure 18 3 102N0252-1 Aft Fuselage Low Pressure Line All
Figure 18 4 HD 06057 Bulkhead Union Fitting All
Figure 18 5 NAS1149F0632P 3/8ID x 5/8OD Washer All
Figure 18 6 102N0251-2 Aft Cabin Low Pressure Line All
Figure 18 7 HD 07094 Fitting, 3/16 Comp Union All
Figure 18 8 102N0251-1 Forward Cabin Low Pressure Line All

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3.6 OXYGEN BOTTLE INSTALLATION

10
11 9 Attachment of Low
2 4
Pressure Line
3

5
7 8 1
6

Attachment of High Pressure Line

Contact Precise Flight or Cirrus Design for Shelf Replacement
Figure 19 - Bottle Installation

Fig. Item Part Number Nomenclature Effective

Figure 19 1 100N0020-4 w/ Bottle Assembly, 77cuft, Remote Fill, 70psig1 4 port
099N0024-1 or manifold
100N1020-4 A/C only
Regulator
Figure 19 1 100N0020-5 w/ Bottle Assembly, 77cuft, Remote Fill, SAE, 70psig1 4 port
099N0025-1 or manifold
100N1020-5 A/C only
Regulator
Figure 19 1 100N0020-4 w/ Bottle Assembly, 77cuft, Remote Fill, 70psig1 4 or 5 port
099N0024-2 manifold
Regulator
Figure 19 1 100N0020-5 w/ Bottle Assembly, 77cuft, Remote Fill, SAE, 70psig1 4 or 5 port
099N0025-2 manifold
Regulator
Figure 19 2 102N0006-1 Cirrus Fixed Oxygen System – Ground Strap All
Figure 19 3 102N0120-1 Band Clamp Assembly, 77cuft Bottle All
Figure 19 4 CDC 16524-002 U-Clamp, Oxygen Bottle All
Figure 19 5 CDC 16523-001 Strap, Oxygen Bottle All
Figure 19 6 MS27039-0805 Screw, Pan Head Structural #8-32 All
NAS1149FN832P Washer, 0.32” Thick
Figure 19 7 CDC 16522-001 Pad, Aluminum, Oxygen Bottle All
Figure 19 8 MS24694S5 Screw, Counter Sunk, Structural #8-32 All
MS21083N08 Nut, #8-32
NAS1149FN832P Washer, 0.32” Thick
Figure 19 9 (Part of item 3) ¼-28 Nylock Nut All
Figure 19 10 (Part of item 3) AN960-4R – ¼ Washer All
Figure 19 11 (Part of item 3) AN316-4R - ¼-28 Nut All

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Notes: 1 – Bottle assembly is available in NPT or SAE ports for the filler line and low pressure outlet
connections, and standard or high flow regulators. Verify part number prior to ordering a
replacement.

3.7 DISPLAY/LOGIC ASSEMBLY INSTALLATION

NOTE:
The Cirrus Built-In Oxygen System has three (3) display/controller configurations. When replacing components take
extra care to make sure the correct part is ordered or replaced per the Precise Flight, Inc. installation drawings.

3.7.1 DISPLAY AND CONTROLLER INSTALLATIONS - STANDARD INSTALLATION

9
1

3
4

5
6

Figure 20 - Display and Logic Assembly Installation

Fig. Item PFI Part Number Nomenclature Effective

Figure 20 1 AN365-632A 6-32 Nylock Nut All
Figure 20 2 AN960-6 #6 Flat Washer All
Figure 20 3 AN365-1032A 10-32 Nylock Nut All
Figure 20 4 AN960-10L #10 Flat Washer 0.032 THK. All
Figure 20 5 AN525-10R7 10-32 x 0.4375L Washer Head Machine Screw All
Figure 20 6 MS21919-DG6 #6 Adel Clamp With Cushion All
Figure 20 7 100N2020-3 Display Logic Assembly, Remote – Low Profile All
Figure 20 8 MS35206-213 Screw 4-40 x ¼ PH HD All
Figure 20 9 100N2120-2 Display Assembly, Low Resolution All
Notes: Special care must be taken when replacing the Display Logic Assembly, and/or the Display Assembly
to make sure they are compatible with the wire harness.
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Cirrus Design SR22/SR22T Built-In Oxygen System
3.7.2 DISPLAY AND CONTROLLER INSTALLATIONS - RIBBON CABLE

1 1

2
3
4
5 5

Figure 21 - Alternate Display and Logic Assembly Installations

Fig. Item PFI Part Number Nomenclature Effective

Figure 21 1 100N2120-1 Display Assy, Low Resolution, with Ribbon Cable All
Figure 21 2 100N2020-3 Display Logic Assy, Remote – Low Profile All
Figure 21 3 100N2020-1 Display Logic Assy, Remote – Low Profile, Slide Lock All
Figure 21 4 102N0320-1 Spacer Plate Adapter All
Figure 21 5 MS35206-213 Screw, 4-40 x ¼ PH HD All
Notes: Special care must be taken when replacing the Display Logic Assembly, and/or the Display Assembly
to make sure they are compatible with the wire harness. If a direct part number replacement is not
available, contact Precise Flight Inc. with part numbers for the Wire Harness, Display, and Display
Logic Assembly. (New installations are in the Figure 20 configuration)

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3.7.3 DISPLAY AND CONTROLLER INSTALLATION – CIRRUS PERSPECTIVE

Figure 22 - Display and Logic Assembly Installations – Cirrus Perspective

Fig. Item PFI Part Number Nomenclature Effective

051A0330-1 IFS Panel Assy., 104 – Flap, Oxygen See Note 1
Figure 22 1 OR
051A0330-2 IFS Panel Assy., 110 – Flap, Oxygen See Note 2
Figure 22 2 100N2030-1 Display Logic Assembly, MFD All
Figure 22 3 MS24693BB28 6-32 x ½” 100° Black Machine Screw All
Figure 22 4 AN960-10L #10 Flat Washer 0.32 Thk. All
Figure 22 5 AN364-1032A 10-32 Nylock Nut All
Figure 22 6 AN525-10R7 Screw, 10-32 x 7/16 Washer HD All
Figure 22 7 NAS1712D4-19S Clamp, Cushioned Loop All
Figure 22 8 MS35206-213 Screw, 4-40 x ¼ PN HD All

Notes: 1. MODEL SR22T S/N's 0001 THRU 0441

MODEL SR22 S/N's 3026 THRU 3914

2. MODEL SR22T S/N's 0442 & SUBSEQUENT

MODEL SR22 S/N's 3915 & SUBSEQUENT

3. Special care must be taken when replacing the Display Logic Assembly, and/or the Display
Assembly to make sure they are compatible with the wire harness. If a direct part number
replacement is not available, contact Precise Flight Inc. with part numbers for the Wire
Harness, Display, and Display Logic Assembly.

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3.7.4 OPTIONAL – REMOTE ANNUNCIATOR (OPTIONAL)

6
7
3 4
5
2
1

Figure 23 - Remote Annuciator

Fig. Item PFI Part Number Nomenclature Effective

Figure 23 1 102N0008-2 Annunciator Wire Harness All
Figure 23 2 Part of Item 1 LED Lamp Holder, Black, Holder Retainer All
Figure 23 3 Part of Item 1 LED, Amber (EL03021) All
Figure 23 4 Part of Item 1 LED Lamp Holder, Black, Nut All
Figure 23 5 Part of Item 1 LED Lamp Holder, Black, Bezel All
Figure 23 6 MS 35206-213 Screw, 4-40 x ¼ PN HD All
Figure 23 7 010A0101-1 LED Annunciator, Driver Assembly All
Figure 23 8 102N0051-1 Placard, Annunciator Dash, Oxygen Required All
Figure 23 - 010A0101-1 Annunciator Driver Wire Harness (NOT SHOWN) All

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3.8 FILLER PORT AND LINE INSTALLATION

See Figure 26

2 16

3
5
4 15
6
7

14
12 13
11
8 9 10
Figure 24 - Filler Port Assembly

Fig. Item PFI Part Number Nomenclature Effective

Figure 24 1 102N0414-1 Bracket, TKS Proportioning Valve (OPTIONAL) All
MS 07084, Screw, 10-32 x 3/8 WH, Cd Stl (AN525-10R6)
Figure 24 2 MS 07052, Screw, 10-32 x ½, PHP, SS (MS51958-63) All
Or MS 07060 Screw, 10-32 x 7/16, PHP, SS (MS51958-62)
Figure 24 3 HD 07104 Receptacle, Camloc (212-12N) All
Figure 24 4 102N0412-1 Access Panel Oxygen All
Figure 24 5 102N0415-1 Door Assembly, Oxygen Filler All
Figure 24 6 102N0411-1 Access Panel, Modification All
Figure 24 7 - See Cirrus IPC for Access Panel Screws All
Figure 24 8 MS 01513 Screw, 6-32 x 3/8 PHP (MS35206-228) All
Figure 24 9 MS 01513 Screw, 6-32 x 3/8 PHP (MS35206-228) All
Figure 24 10 MS 01099 Flat Washer, #6 (AN960-6 or NAS1149FN616P) All
MS 01708 Screw, 8-32 x ½ WHD, Cd Stl (AN525-832R8)
Figure 24 11 All
Or MS 01743 Screw, 8-32 x 7/16, PHP (MS35206-244)
Figure 24 12 OX MI124 Filler Check Valve (MS22066-3) All
Figure 24 13 102N0450-1 Remote Filler with Pressure Gage Assembly All
Figure 24 14 102N0413-1 Bracket, Remote Filler All
Figure 24 15 MS 07064 Rivet, Blind (CCR264xS-3-0x) All
Figure 24 16 MS 01338 Nutplate, 8-32 Floating (MS21059-L08) All

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FAA Approval Date: _1/31/2017_______ Page 34 of 36
 63354 POWELL BUTTE ROAD Document
BEND, OR 97701 102NMAN0003
Number:
800- 547-2558
www.preciseflight.com Revision Number: G

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System
3.8.1 ALTERNATE FILLER PORT AND LINE INSTALLATION

See Figure 26

2 1

3
4 16
5
6
7 15

14
13

10 11 12
8
9
Figure 25 - Filler Port Assembly

Table 3

Fig. Item PFI Part Number Nomenclature Effective

Figure 25 1 035N1413-1 Bracket, Remote Filler All
MS 07084, Screw, 10-32 x 3/8 WH, Cd Stl (AN525-10R6)
Figure 25 2 MS 07052, Screw, 10-32 x ½ PHP, SS (MS51958-63) All
Or MS 07060 Screw, 10-32 x 7/16 PHP, SS (MS51958-62)
Figure 25 3 HD 07276 Recept, ¼ Turn, Southco (82-35-295-15 or 82-35-295-20) All
Figure 25 4 102N0453-1 Access Panel, Oxygen, Flat Door All
Figure 25 5 035N0415-1 Door Assembly, Flat - Oxygen Filler All
Figure 25 6 102N0411-2 Access Panel, Modification, wide All
Figure 25 7 - See Cirrus IPC for Access Panel Screws All
Figure 25 8 MS 01513 Screw, 6-32 x 3/8 PHP (MS35206-228) All
Figure 25 9 MS 01350 Rivet, 3/32 x ¼ (MS20426AD3-4) All
Figure 25 10 HD 07277 Bumper, square, silicone (3592K6) All
Figure 25 11 035N0425-1 Placard, Bumper Locator All
MS 01708 Screw, 8-32 x ½ Washer Head (AN525-832R8)
Figure 25 12 All
Or MS 01743 Screw, 8-32 x 7/16 PHP (MS35206-244)
Figure 25 13 OX 020245 Filler Check Valve (MS22066-1) All
Figure 25 14 035N0210-1 Remote Filler with Pressure Gage Assembly All
Figure 25 15 MS 07064 Rivet, Blind (CCR264xS-3-0x) All
Figure 25 16 MS 01338 Nutplate, 8-32 Floating (MS21059-L08) All

Title Page Rights Apply

FAA Approval Date: _1/31/2017_______ Page 35 of 36
 63354 POWELL BUTTE ROAD Document
BEND, OR 97701 102NMAN0003
Number:
800- 547-2558
www.preciseflight.com Revision Number: G

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS – STC SA01708SE

Cirrus Design SR22/SR22T Built-In Oxygen System

Figure 26 - High-Pressure Line Installation

Fig. Item PFI Part Number Nomenclature Effective

Figure 26 1 102N0420-1 High Pressure Oxygen Line All
Or Note: 102N0421-1 replaces 102N0420-1 and 102N0420-2.
102N0420-2 Cable tie mounts may need to be relocated for a new line
Or installation.
102N0421-1

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FAA Approval Date: _1/31/2017_______ Page 36 of 36