March 13th, 2014

777 Aviation Dr Revision B

Camarillo, Ca 93010
USA

Maintenance
Support
Document

AS350 Arriel - ICA

Instructions for Continued Airworthiness;

Installation of an AKV, Inc Arriel 1 Ng/Np Cycle Counter

P/N 350NGTEC

STC Number: SR01452LA

S/N _____

PROPRIETARY. ALL RIGHTS RESERVED. NO PORTION OF THIS DOCUMENT MAY BE REPRODUCED OR TRANSMITTED IN ANY
FORM OR BY ANY MEANS, ELECTRONIC OR MECHANICAL, INCLUDING BY PHOTOCOPYING, RECORDING OR USE OF ANY
INFORMATION STORAGE AND RETRIEVAL SYSTEM WITHOUT EXPRESS WRITTEN PERMISSION OF AKV, Inc.
©2012 AKV, Inc
AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REVISIONS INTRODUCTION
The latest revision of this document is indicated by the highest revision letter as listed below in the Revision
History and List of Effective Pages. Changes to the current revision will be indicated within the document by
change bars. (Reference Section 1.) The entire document will be reprinted to reflect the current revision level.

REVISION HISTORY

Instructions for Continued Airworthiness; AKV Inc

Arriel-ICA
Arriel 1 Engine Cycle Counter P/N 350NGTEC
Rev. Date Revision Description Approval
A December 14th, Initial Release PREPARED

2004 J. Gunn
CHECKED

J. Gunn
APPROVED

J. Gunn
B March 13th, 2014 Changed to new format. PREPARED
Added new procedure for the J.Gunn
“Coherence Check” Sect 5.1 CHECKED

J.Tipton
APPROVED

PREPARED

CHECKED

APPROVED

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

LIST OF EFFECTIVE PAGES

All pages are revised when any page is changed so that all pages maintain the same revision
level.

PAGE REVISION DATE

ALL B 3/13/14

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

TABLE OF CONTENTS
1. INTRODUCTION .................................................................................................................... 1
1.1 Service Difficulties ......................................................................................................... 1
1.2 Warnings, Cautions, and Notes ..................................................................................... 1
1.3 Language....................................................................................................................... 1
1.4 References .................................................................................................................... 1
1.5 Revision to ICA .............................................................................................................. 1
1.6 Abbreviations and Definitions ........................................................................................ 2

2. AIRWORTHINESS LIMITATIONS ......................................................................................... 2

3. DESCRIPTION........................................................................................................................ 2
3.1 General .......................................................................................................................... 2
3.2 Cycle Counter Installation .............................................................................................. 2
3.3 Cycle Counter Operation ............................................................................................... 3

4. MAINTENANCE INSTRUCTIONS ......................................................................................... 3

4.1 Routine Cleaning & Maintenance .................................................................................. 3
4.2 Tools .............................................................................................................................. 3
4.3 Overhaul ........................................................................................................................ 4
4.4 Component Retirement/Retirement Life ........................................................................ 4

5. REQUIRED INSPECTIONS.................................................................................................... 7
5.1 Daily coherence check .................................................................................................. 7
5.2 Annual Inspection .......................................................................................................... 7
5.3 Special Inspection ......................................................................................................... 7

6. REMOVING AND REPLACING PARTS ................................................................................ 9

6.1 To Remove the Cycle Counter ...................................................................................... 9
6.2 To Replace the Cycle Counter ...................................................................................... 9

7. TROUBLESHOOTING ......................................................................................................... 10

8. WEIGHT AND BALANCE CHANGES ................................................................................. 11

APPENDIX A – WIRING DIAGRAMS – Rev. H .......................................................................... 12

NCC-002 - Ng Cycle Counter Mounting ............................................................................. 13
NCC-003-1 - Ng Cycle Counter Wiring Harness Installation ................................................ 14
NCC-003-2 - Ng Cycle Counter Wiring Harness Installation ............................................... 14
NCC-004 - Ng Cycle Counter Wire Harness Routing ....................................................... 15
NCC-005 - Ng Cycle Counter Wiring Diagram .................................................................. 16
NCC-006 - Ng Cycle Counter Wiring Harness .................................................................. 18
NCC-007 - Ng Cycle Counter Final Assembly .................................................................. 19
NCC-008 - Ng Cycle Counter Optional Encoder General Arrangement ........................... 20
NCC-009 - Ng Cycle Counter Optional Encoder & Bracket Mounting Detail ..................... 21
NCC-010 - Ng Cycle Counter Optional Encoder Cable Routing ....................................... 22
NCC-011 - Ng Cycle Counter Optional Encoder Communication Cable Assembly .......... 23

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

APPENDIX B – WIRING DIAGRAMS – Rev. G & Older ............................................................ 24

NCC-002 - Ng Cycle Counter Mounting ............................................................................... 25
NCC-003 - Ng Cycle Counter Wiring Harness Installation ................................................... 26
NCC-004 - Ng Cycle Counter Wire Harness Routing .......................................................... 27
NCC-005 - Ng Cycle Counter Wiring Diagram ................................................................... 28
NCC-006 - Ng Cycle Counter Wiring Harness ..................................................................... 29
NCC-007 - Ng Cycle Counter Final Assembly (not supplied to installer) ............................ 30
NCC-008 - Ng Cycle Counter Optional Encoder General Arrangement .............................. 31
NCC-009 - Ng Cycle Counter Optional Encoder & Bracket Mounting Detail ....................... 32
NCC-010 - Ng Cycle Counter Optional Encoder Cable Routing .......................................... 33
NCC-011 - Ng Cycle Counter Optional Encoder Communication Cable Assembly ............ 34

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 AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

1. INTRODUCTION
This AKV, Inc maintenance support document provides instructions for the continued
airworthiness of the AKV Arriel 1 Ng/Np Cycle Counter P/N 350NGTEC. The basis for this
document is 14 CFR 27.1529 and Appendix A to Part 27.

1.1 Service Difficulties

Technical Assistance can be provided by:
AKV, Inc.
777 Aviation Dr.
Camarillo, CA 93010
USA
Tel 805 437-1739
Fax 805 437-1783
Email: sales@akvinc.com
Web: www.akvinc.com

1.2 Warnings, Cautions, and Notes

WARNING
FAILURE TO FOLLOW INSTRUCTIONS GIVEN IN A WARNING MAY
RESULT IN PERSONAL INJURY OR DEATH.

CAUTION
FAILURE TO FOLLOW INSTRUCTIONS GIVEN IN A CAUTION MAY
RESULT IN DAMAGE TO THE HELICOPTER
Note
A note includes supplemental data about the procedure, practice,
condition, etc., for the maintenance task you are about to perform.

1.3 Language
This manual is written to the Simplified English (SE) specification. This International
Aerospace Maintenance Language Specification is important to maintenance personnel
whose first language is not English.

1.4 References
The use of parentheses throughout this document is for denoting or depicting a reference
to other sections, items, details, etc., the intent of which is to further identify or clarify
existing information.

1.5 Revision to ICA

Revisions to this document and the documents listed within it are distributed to the
operators who have this modification installed on the subject aircraft, either in electronic
or paper format and is reliant on our database for accuracy. It is the owners responsibility

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 AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

to contact AKV to confirm the current ICA Revision and if an ownership change is made
so that we can update our records.

1.6 Abbreviations and Definitions

AEG Aircraft Evaluation Group
A&P Airframe & Powerplant Mechanic
CFR Code of Federal Regulations
RFM Rotorcraft Flight Manual
RFMS Rotorcraft Flight Manual Supplement
FAR Federal Aviation Regulations

2. AIRWORTHINESS LIMITATIONS
This section is FAA approved and specifies the inspections, and other maintenance, which are
required under 14 CFR 43.16 and 91.403, unless an alternative program has been FAA
approved.

There are “No airworthiness limitations associated with this type design change”.

3. DESCRIPTION
3.1 General
The Arriel 1 Cycle Counter is Turbomeca validated as a cycle counting aid system for the
Arriel 1 engine. It is programmed with the latest cycle counting procedure from Turbomeca.
Any future revisions to the software can be installed in the field with the AKV Ground
Support Equipment (GSE) Programming Kit P/N CC-GSE sold separately. The GSE is also
used to reset the running totals for Ng, Np engine starts, flight time and engine run time
such as when the cycle counter is installed in an existing operational helicopter or during
module or engine change. It is up to maintenance personnel to make sure that any values
programmed into the cycle counter are accurate and are the most current.

3.2 Cycle Counter Installation

The enclosure is mounted on the co-pilot’s side pedestal below the instrument panel. It
obtains the Ng and Np signals by connection to the existing signal generators behind the
instrument panel and at the rear of each indicator. Interface with the collective micro switch
to control the flight timer within the cycle counter is also provided on Rev. H and newer
systems.

A Single power source via a 1 amp circuit breaker supplies provides power to the cycle
counter via the pp5 buss.

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 AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

Figure 1 – Un-Installed View of the Cycle Counter

3.3 Cycle Counter Operation

For detailed description of the Cycle Counter installed with the Turbomeca Validated
software, please refer to the “AKV Arriel 1 Cycle Counter Operating Specification”
document supplied separately from this ICA.

4. MAINTENANCE INSTRUCTIONS
4.1 Routine Cleaning & Maintenance
Routine Cleaning & Maintenance of the Cycle Counter may be required as the result of an
inspection. Re-tighten loose fasteners to the standard torque values shown in Table 1 and
Table 2. Perform routine cleaning to remove contaminants from the Cycle Counter.
Remove dirt from equipment using a clean, soft cloth dampened with mild soap and warm
water; avoid damaging the finish.

CAUTION
USE OF EXCESSIVE FORCE CAN DAMAGE THE LENS AND DECALS

4.2 Tools
No special tools are required.

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

4.3 Overhaul
There are no component overhaul requirements for this type design change. Under normal
operating conditions the Cycle Counter will not require component overhaul. All parts and
assemblies are designed to be replaced “On Condition”. Any maintenance needed to the
Cycle Counter or its installation beyond that described in this document requires that the
components be removed and returned to AKV, Inc. The decision to return damaged
components may be a subjective one and should be made by a qualified A & P Mechanic.

4.4 Component Retirement/Retirement Life

The Cycle Counter has been designed with components that have a virtually unlimited life
span. However, it is anticipated that some components may require replacement at some
time during the service life of the helicopter. The decision to replace these parts is a
subjective one and should be made by the operator or an A & P Mechanic.

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

Bolts -- Steel Tension Bolts -- Steel Tension Bolts -- Aluminum

AN 3 – AN 20 MS 20004 – MS 20024 AN 3DD – AN 20DD
AN 42 – AN 49 NAS 144 – NAS 158 AN 173DD – AN 186DD
AN 73 – AN 81 NAS 583 – NAS 590 AN 509DD
AN 173 – AN 186 NAS 144 – NAS 158 AN 525D
MS 20033 – MS 20046 NAS 144624 – NAS 644 MS 27039D
MS 20073 NAS 1303 – NAS 1320 MS 24694DD
MS 20074 NAS 172 --------
AN 509 NK9 NAS 174 --------
MS 24694 NAS 517 --------
AN 525 NK525 -------- --------
MS 27030 -------- --------
Steel Shear Bolt
NAS 464

Nuts Nuts Nuts

Steel Tension Steel Shear Steel Tension Steel Shear Aluminum Tension Aluminum Shear
AN 310 AN 320 AN 310 AN 320 AN 365D AN320D
AN 315 AN 364 AN 315 AN 364 AN 310D AN 364D
AN 363 NAS 1022 AN 363 NAS 1022 NAS 1021D NAS 1022D

AN 365 MS 17826 AN 365 MS 17826 -------- --------

NAS 1021 MA 20364 MS 17825 MS 20364 -------- --------
MS 17825 -------- MS 20365 -------- -------- --------
MS 21045 -------- MS 21045 -------- -------- --------
MS 20365 -------- NAS 1021 -------- -------- --------
MS 20500 -------- NAS 679 -------- -------- --------
NAS 679 -------- NAS 1291 -------- -------- --------
1
FINE THREAD SERIES

Torque Limits Torque Limits Torque Limits Torque Limits Torque Limits Torque Limits
Nut-Bolt In-lbs. In-lbs. In-lbs. In-lbs. In-lbs. In-lbs.
Size
Min. Max Min. Max Min. Max Min. Max Min. Max Min. Max
8 - 36 12 15 7 9 ------ ------ ------ ------ 5 10 3 6
10 - 32 20 25 12 15 25 30 15 20 10 15 5 10
1
/4 - 28 50 70 30 40 80 100 50 60 30 45 15 30
5
/16 - 24 100 140 60 85 120 145 70 90 40 65 25 40
3
/8 - 24 160 190 95 110 200 250 120 150 75 110 45 70
7
/16 - 20 450 550 270 300 520 630 300 400 180 280 110 170
1
/2 - 20 480 690 290 410 770 950 450 550 280 410 160 260
9
/16 - 18 800 1000 480 600 1100 1300 650 800 380 580 230 360
5
/8 - 18 1100 1300 660 780 1250 1550 750 950 550 670 270 420
3
/4 - 16 2300 2500 1300 1500 2650 3200 1600 1900 950 1250 5560 880
7
/8 - 14 2500 3000 1500 1800 3550 4350 2100 2600 1250 1900 750 1200
1 - 14 3700 4500 2200 3300 4500 5500 2700 3300 1600 2400 950 1500
11/8 - 12 5000 7000 3000 4200 6000 7300 3600 4400 2100 3200 1250 2000
11/4 - 12 9000 11000 5400 6600 11000 13400 6600 8000 3900 5600 2300 3650

Table 1: Recommended torque values for nut-bolt combinations: Fine Thread Series

1 Torque values without lubrication

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

Bolts -- Steel Tension Bolts -- Steel Tension Bolts -- Aluminum

AN 3 – AN 20 MS 20004 – MS 20024 AN 3DD – AN 20DD

AN 42 – AN 49 NAS 144 – NAS 158 AN 173DD – AN 186DD

AN 73 – AN 81 NAS 583 – NAS 590 AN 509DD
AN 173 – AN 186 NAS 144 – NAS 158 AN 525D
MS 20033 – MS 20046 NAS 144624 – NAS 644 MS 27039D
MS 20073 NAS 1303 – NAS 1320 MS 24694DD
MS 20074 NAS 172 --------
AN 509 NK9 NAS 174 --------
MS 24694 NAS 517 --------
AN 525 NK525 -------- --------
MS 27030 -------- --------
Steel Shear Bolt
NAS 464
Nuts Nuts Nuts
Steel Tension Steel Shear Steel Tension Steel Shear Aluminum Tension Aluminum Shear
AN 310 AN 320 AN 310 AN 320 AN 365D AN320D
AN 315 AN 364 AN 315 AN 364 AN 310D AN 364D
AN 363 NAS 1022 AN 363 NAS 1022 NAS 1021D NAS 1022D

AN 365 MS 17826 AN 365 MS 17826 -------- --------

NAS 1021 MA 20364 MS 17825 MS 20364 -------- --------
MS 17825 -------- MS 20365 -------- -------- --------
MS 21045 -------- MS 21045 -------- -------- --------
MS 20365 -------- NAS 1021 -------- -------- --------
MS 20500 -------- NAS 679 -------- -------- --------
NAS 679 -------- NAS 1291 -------- -------- --------
2
COARSE THREAD SERIES

Torque Limits Torque Limits Torque Limits Torque Limits Torque Limits Torque Limits
Nut-Bolt In-lbs. In-lbs. In-lbs. In-lbs. In-lbs. In-lbs.
Size
Min. Max Min. Max Min. Max Min. Max Min. Max Min. Max
8 - 32 12 15 7 9 ------ ------ ------ ------ ------ ------ ------ ------
10 - 24 20 25 12 15 ------ ------ ------ ------ ------ ------ ------ ------
1
/4 - 20 40 50 25 30 ------ ------ ------ ------ ------ ------ ------ ------
5
/16 - 18 80 90 48 55 ------ ------ ------ ------ ------ ------ ------ ------
3
/8 - 16 160 185 95 110 ------ ------ ------ ------ ------ ------ ------ ------
7
/16 - 14 235 255 140 155 ------ ------ ------ ------ ------ ------ ------ ------
1
/2 - 13 400 480 240 290 ------ ------ ------ ------ ------ ------ ------ ------
9
/16 - 12 500 700 300 420 ------ ------ ------ ------ ------ ------ ------ ------
5
/8 - 11 700 900 420 540 ------ ------ ------ ------ ------ ------ ------ ------
3
/4 - 10 1150 1600 700 950 ------ ------ ------ ------ ------ ------ ------ ------
7
/8 - 9 2200 3000 1300 1800 ------ ------ ------ ------ ------ ------ ------ ------
1-8 3700 5000 2200 3000 ------ ------ ------ ------ ------ ------ ------ ------
1
1 /8 - 8 5500 6500 3300 4000 ------ ------ ------ ------ ------ ------ ------ ------
11/4 - 8 6500 8000 4000 5000 ------ ------ ------ ------ ------ ------ ------ ------

Table 2: Recommended torque values for nut-bolt combinations: Coarse Thread Series

2 Torque values without lubrication

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 AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

5. REQUIRED INSPECTIONS

5.1 Daily coherence check

The following procedure provides an approved method for conforming with the Turbomeca
“coherence check” as specified in the Turbomeca maintenance manual or with reference to
Turbomeca General Service Letter No. 2283/04 5th issue. It will provide a means to
determine that the cycle counter is recording cycles within your normal mission range.

Procedure: To understand your normal mission range, determine what the total manual
count was for the last 10 flights. Add all 10 flights together and then divide by 10. The result
is the average consumed cycles to which your normal range is determined by adding +/-
10%. Perform this function separately for Ng and Np.

After the last flight of the day, compare the recorded cycles from the digital display with your
normal mission range values. This method will insure that there is no significant discrepancy
which would be evident with either a digital display of zero “flt” cycles or “flt” cycles that are in
excess of what is the normal mission range. In the event that either of these situations is
observed, then perform the Annual Inspection of the cycle counter as described below.

5.2 Annual Inspection

An Annual inspection for functionality using this ICA document is required. When using the
ICA to perform the required inspections, use the “Annual Inspection” and subsequent
“Inspection Task Description” form below to perform the appropriate functional checks.

Any reference data needed to perform this inspection, other than this document, will be
listed in the “Data Reference” column of the inspection forms.

The inspection task to be completed is described in the “Inspection Task Description”

column of the inspection form. When each task is completed satisfactorily, the mechanic
performing the inspection task signs the “Mechanic” column for that task.

If the inspection task fails the inspection, the reason for the failure must be determined and
remedial action taken before the “Mechanic” block can be signed off. Remedial action may
involve checking for broken wires or poor connections, sending the assembly to the
manufacturer for inspection, overhaul or replacement, etc. Once the appropriate remedial
action has been taken and the annual inspection task has been satisfactorily performed,
the mechanic may sign off the “Mechanic” block.

Once all tasks are signed off in the “Mechanic” Column, the inspection form may be signed
off at the top of the form. The inspection has then been completed.

5.3 Special Inspection

In the event of a hard landing, perform the “Annual Inspection” above prior to returning the
aircraft to service.

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 AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

Helicopter S/N:________________________________ Registration: ____________________________________

Facility: ______________________________________ W.O.: _________________________________________
Flight Total time: ______________________________ Engine Run Total time: ___________________________
Ng Cycles: ___________________________________ Np Cycles: _____________________________________
Engine Starts: ________________________________ Date started: ___________________________________
Signature: ___________________________________ License number: ________________________________

Annual Inspection

Data
Inspection Task Description Mechanic
Reference

Functional Check
Note: Refer to the “Arriel 1 Operating Specification” document for detailed information
on the cycle counter operation. The AKV Cycle Counter utilizes a special version of the
recommended procedure which is validated by Turbomeca as “Linear Ver Rev 1” or
later approved revisions. The ”Linear “ version” is a Turbomeca approved variant of the
“recommended procedure” and records a K1 penalty for each 0.1% of speed increase
due to the higher resolution capability of the cycle counter. The installed software
version is indicated on the cycle counter power-up screen. Contact AKV to upgrade the
software to this version if it is not installed.

1. Perform a ground run of the A/C and observe the first data screen for the Ng and Np
speeds. These values are compared to the instrument panel indicators and should be
within +/- 0.5%.
Arriel 1
Operating Note: Ground runs of the A/C do not require cycle penalties to be recorded. A flight must
Specification be initiated in order to observe cycle penalties next to the “Flt” indication on the digital
display.

2. Perform a normal departure, cruise and landing. Note the Max Ng (K1) to the nearest
0.1% during takeoff and the min Ng speed (K2) during power reduction as well as how
many times Ng was > 85% then < 85% then > 85%. After shutdown, compare your
estimated cycle count using the Arriel Operating Specification document examples
starting on Pg 11 for both Ng and Np.

Make sure there is no significant discrepancy between the estimated values and
recorded values shown on the cycle counter. If a discrepancy exists, refer to the
troubleshooting sect. 7 or contact AKV for further assistance. In place of the AKV Cycle
Counter, continue operating the A/C using the Turbomeca “manual cycle counting”
procedure during removal and repair of the cycle counter.

After the cycle counter is repaired, repeat this “Annual Inspection” procedure to verify
correct operation. Use the GSE programming kit to update the cycle counter with any
new totals.

END OF PROCEDURE
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 AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

Data
Inspection Task Description Mechanic
Reference

Blank

6. REMOVING AND REPLACING PARTS

Removal and Replacement instructions for the AKV Cycle Counter is listed below.

6.1 To Remove the Cycle Counter

a) Disconnect the airframe electrical connector from the Cycle Counter enclosure
b) Remove the 2 mounting screws and nuts holding the Cycle Counter to the panel
c) Install a plastic bag over the airframe connector and secure with zip ties.

6.2 To Replace the Cycle Counter

a) Reverse the above procedure
b) If updated values are needed to be installed in the replaced Cycle Counter, use the
Ground Support Programming Kit P/N CC-GSE and reference the supplied
documentation.

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 AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

7. TROUBLESHOOTING
The troubleshooting table provides the mechanic with guidance for diagnosing malfunctions and
the recommended course of action to remedy the fault. Use in conjunction with the Inspection
Program in Section 5 or contact AKV. See Page 1 for contact information.

Fault Probable Cause Action

No power to unit when 1. Reset the Circuit breaker
1. Check Circuit
the aircraft battery power 2. Turn off aircraft battery power
breaker
is applied which would be and check connector with
2. Check the
indicated by a blank reference to the attached
Connector
display applicable DWG.

Verify electrical connector at

Signal Generator is clean and
Engine Signal
High Ng and or Np cycles secure.
Generator is noisy
** Perform signal quality
check below.

Confirm that a ground bonding

Electro-static strap from the enclosure to
Blinking cursor in the top discharge has airframe ground is present,
left corner of the display damaged the secure and has < 3 milliohm
computer board resistance. Cycle Counter will
need to be returned to AKV for
repair.

NOTE: If the above actions do not resolve the issue, contact AKV to arrange for the unit to be
returned for repair.

** Signal quality check

1. Connect an oscilloscope to the cycle counter airframe wire harness female connector for Ng or
Np whichever signal is of concern.

- Refer to attached DWG NCC-006 in Appendix A for Rev. H

- Refer to attached DWG NCC-006 in Appendix B for Rev. G and older

2. Ground run the A/C at idle and observe the quality of the sine-wave signal is as shown in Fig 1.

3. Whilst observing the oscilloscope, slowly increase the FCL to the flight position and observe
that the sine-wave remains as shown in Fig 1 thru the speed change.

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 AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

NOTE: A bad sine-wave signal will look similar to figure 2. If this is observed, replace the signal
generator and perform the test again to confirm the quality of the signal is displayed like Fig 1.

CLEAN

Fig. 1 (good)

NOISE

Fig. 2 (bad)

8. WEIGHT AND BALANCE CHANGES

In the event the Engine Cycle Counter has to be removed for maintenance, use the following
table to adjust the aircraft weight and balance data.

Component Weight

Cycle Counter Enclosure <1 Lb

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

Appendix A

WIRING DIAGRAMS – Rev. H

This chart lists all drawings that make up the Master Drawing List (MDL) NCC-001 for the Arriel 1
Ng/Np Cycle Counter P/N 350NGTEC, Rev. H.

Drawing Initial
Revision Drawing Description
Number Release
NCC-002 Rev C 3/13/14 Ng Cycle Counter Mounting

NCC-003-1 Rev E 3/13/14 Ng Cycle Counter Wiring Harness Installation

NCC-003-2 Rev NC 3/13/14 Ng Cycle Counter Wiring Harness Installation

NCC-004 Rev D 3/13/14 Ng Cycle Counter Wire Harness Routing

NCC-005 Rev C 3/13/14 Ng Cycle Counter Wiring Diagram (not supplied to installer)

NCC-006 Rev B 3/13/14 Ng Cycle Counter Wiring Harness

NCC-007 Rev D 3/13/14 Ng Cycle Counter Final Assembly (not supplied to installer)

NCC-008 Rev C 3/13/14 Ng Cycle Counter Optional Encoder General Arrangement

NCC-009 Rev B 9/19/08 Ng Cycle Counter Optional Encoder & Bracket Mounting Detail

NCC-010 Rev C 3/13/14 Ng Cycle Counter Optional Encoder Cable Routing

Ng Cycle Counter Optional Encoder Communication Cable
NCC-011 Rev B 9/19/08
Assembly (not supplied to installer)

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Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. H
NCC-002 – Ng Cycle Counter Mounting

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. H
NCC-003-1 – Ng Cycle Counter Wiring Harness Installation

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. H
NCC-003-2 – Ng Cycle Counter Wiring Harness Installation

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. H
NCC-004 – Ng Cycle Counter Wire Harness Routing

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. H
NCC-005 – Ng Cycle Counter Wiring Diagram

(Drawing not supplied to installer)

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. H
NCC-006 – Ng Cycle Counter Wiring Harness

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. H
NCC-007 – Ng Cycle Counter Final Assembly

(Drawing not supplied to installer)

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. H
NCC-008 – Ng Cycle Counter Optional Encoder General Arrangement

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. H
NCC-009 – Ng Cycle Counter Optional Encoder & Bracket Mounting Detail

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. H
NCC-010 – Ng Cycle Counter Optional Encoder Cable Routing

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. H
NCC-011 – Ng Cycle Counter Optional Encoder Communication Cable Assembly

(Drawing not supplied to installer)

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 AKV, Inc
Arriel 1 Ng/Np Cycle Counter
Instructions for Continued Airworthiness

Appendix B

WIRING DIAGRAMS – Rev. G & Older

This chart lists all drawings that make up the Master Drawing List (MDL) NCC-001 for the Arriel 1
Ng/Np Cycle Counter P/N 350NGTEC.

Drawing Initial
Revision Drawing Description
Number Release
NCC-002 Rev B 12-20-02 Ng Cycle Counter Mounting

NCC-003 Rev D 12-20-02 Ng Cycle Counter Wiring Harness Installation

NCC-004 Rev C 12-19-02 Ng Cycle Counter Wire Harness Routing

NCC-005 Rev B 12-18-02 Ng Cycle Counter Wiring Diagram (not supplied to installer)

NCC-006 Rev A 3-10-03 Ng Cycle Counter Wiring Harness

NCC-007 Rev C 3-10-03 Ng Cycle Counter Final Assembly (not supplied to installer)

NCC-008 Rev B 6-02-04 Ng Cycle Counter Optional Encoder General Arrangement

NCC-009 Rev B 6-02-04 Ng Cycle Counter Optional Encoder & Bracket Mounting Detail

NCC-010 Rev B 6-02-04 Ng Cycle Counter Optional Encoder Cable Routing

Ng Cycle Counter Optional Encoder Communication Cable
NCC-011 Rev B 6-02-04
Assembly (not supplied to installer)

Rev. G & Older

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. G & OLDER

NCC-002 – Ng Cycle Counter Mounting

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AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. G & OLDER

NCC-003 – Ng Cycle Counter Wiring Harness Installation

26 of 34
AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. G & OLDER

NCC-004 – Ng Cycle Counter Wire Harness Routing

27 of 34
AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. G & OLDER

NCC-005 – Ng Cycle Counter Wiring Diagram

(Drawing not supplied to installer)

28 of 34
AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. G & OLDER

NCC-006 – Ng Cycle Counter Wiring Harness

29 of 34
AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. G & OLDER

NCC-007 – Ng Cycle Counter Final Assembly

(Drawing not supplied to installer)

30 of 34
AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. G & OLDER

NCC-008 – Ng Cycle Counter Optional Encoder General Arrangement

31 of 34
AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. G & OLDER

NCC-009 – Ng Cycle Counter Optional Encoder & Bracket Mounting Detail

32 of 34
AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. G & OLDER

NCC-010 – Ng Cycle Counter Optional Encoder Encoder Cable Routing

33 of 34
AKV, Inc Arriel-ICA
Arriel 1 Ng/Np Cycle Counter Rev B
Instructions for Continued Airworthiness March 13th, 2014

REV. G & OLDER

NCC-011 – Ng Cycle Counter Optional Encoder Communication Cable Assembly

(Drawing not supplied to installer)

34 of 34