Model S550 Maintenance Manual (Rev 21)
5-11-00 (Rev 21)
COMPONENT TIME LIMITS
1. Component Time Limit
A. All components not listed herein should be inspected as detailed elsewhere in this chapter and repaired, overhauled or
replaced as required. Items shown here should be overhauled or replaced during the regular maintenance periods falling due
nearest to the specified limit.
B. Items that are underlined are Chapter 4, Airworthiness Limitations requirements. Refer to Chapter 4, Airworthiness
Limitations for additional information.
C. The replacement life for each component listed in this section applies to the part throughout its life on the original installation
and on later installations. The life (number of hours or number of landings) must be recorded individually for these components
and must remain with the component during removal. For example, if a component is removed for overhaul, it must be tagged
with the life (number of hours or number of landings) to the date of removal, and this tag must remain with the component
throughout the overhaul process. (overhaul of a component does not zero time the life of the component.) When received from
overhaul and installed on an airplane, the life of the component must be recorded to allow continued accumulation toward the life
limit.
D. Life limited components which have exceeded replacement life limits because of a current change in the inspection program,
may continue in service if the component is serviceable, and part is on order. The replacement part must be placed on order
immediately. Occasional parts shortages may result in shipping delays. replacement part(s) must be installed within 60 days of
receipt.
2. Schedule
A. Air Conditioning (Chapter 21).
(1) Environment Control Unit (Hamilton Standard). Recommended Economic Overhaul -- 5000 Hours
NOTE: Overhaul interval is a recommended economic overhaul period defined by Hamilton Standard for
air cycle machine. For additional information refer to Hamilton Standard Service Information
Release SIR R70-3W-13B dated 31 May 1985.
(2) Overhead Cabin Fan (Part Number 9912323-2) (Replace) -- 1000 hours
(3) Defog Fan (Part Number 5703-3, -4). Replace or Overhaul -- 3500 hours
(4) Compressor Drive Motor Brushes (Compressor Motors 1134104-1, -5 or FWA1134104-1, -5) - Replace every 500
compressor hours.
NOTE: Refer to the Enviro Systems Inc. Operating, Servicing and Component Maintenance Manual 21-00-
24.
B. Communications (Chapter 23)
(1) Cockpit Voice Recorder Underwater Locator Beacon Battery - Replace every 6 years (Refer to Task 23-70-00-960).
C. Equipment and Furnishings (Chapter 25).
(1) Locator Beacon Battery Pack
(a) C3000. Replace -- 3 Years
NOTE: Battery must be replaced after 3 years from date of manufacture stamped on battery; or after
transmitter is used in an emergency situation; or after the transmitter has been operated for
more than one cumulative hour; or on or before battery replacement date.
D. Fire Protection (Chapter 26).
(1) Engine Fire Extinguisher Cartridge (Part Number 13083-5). Refer to Table 1.
(2) Engine Fire Extinguisher Cartridge (Part Number AE13083-5). Refer to Table 1.
Table 1. Fire Bottle Cartridge Life
CARTRIDGE PART NUMBER SERVICE LIFE (YEARS) TOTAL LIFE (YEARS)
873364 3 6
873364-1 N/A 10
13083-5 6 6
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Model S550 Maintenance Manual (Rev 21)
5-11-00 (Rev 21)
AE13083-5 The combined shelf-life and the 10
service life cannot exceed ten (10)
years.
NOTE: Service life is the amount of time the explosive cartridge is installed in a fire extinguisher. Service life of
any particular explosive cartridge can not be extended.
NOTE: Total life starts on the day the cartridge is made and must be replaced at a specific time. A date
(month/year) is stamped or marked on the plastic bag containing the cartridge or on the cartridge body.
Total life cannot be extended and includes any mix of time the explosive cartridge is kept ”on the shelf”
and/or installed in a fire extinguisher.
E. Flight Controls (Chapter 27).
(1) Flaps
(a) Inboard and Outboard Flap Aft Rollers (Part Number CC50380) -- Replace 5000 flights
(b) Inboard and Outboard Flap Aft Rollers (Part Number CC59163) -- Replace 5000 flights
(c) Flap Bell Crank Bolt, WS 112.00 (Part Number NAS624H106) (Airplanes -0001 thru -0159 Except Airplanes
Incorporating SBS550-57-3). Replace -- 1000 landings
NOTE: When replacing NAS624H106 flap bell crank bolt, all washers used for shimming between the
bell crank bearing race and bell crank mounting brackets must be installed between the lower
bearing race and the flap bell crank lower mounting bracket (six washers maximum). Visually
inspect the flap bell crank, upper mounting bracket in the area of the flap bell crank bolt for
cracks.
F. Indicating/Recording Systems (Chapter 31).
(1) Sundstrand Flight Data Recorder
(a) Perform maintenance per schedule published in Sundstrand Service Information Letter. -- 5000 hours
NOTE: Refer to Sundstrand Service Information Letter S.I.L. No: UFDR-4100- 31-10 for specific
maintenance and component replacement schedule.
G. Landing Gear (Chapter 32).
(1) Nose Landing Gear (United States Certified)
NOTE: Attached hardware, which includes the bolts, bearings, bushings, trunnion pins, and trunnion/link
pins, related to the installation of the components below must be replaced when the related
component is replaced. Refer to Chapter 32 for more information.
(a) Nose Landing Gear Assembly and Attaching Hardware 6642000-2, -6, -201, -202, -204, -205 -- Replace 23,900
landings
(b) Left Trunnion Support 6613056-1-- Replace 11,600 landings
(c) Right Trunnion Support 6613056-2 -- Replace 11,600 landings
(d) Left Trunnion Support 6613056-3, -5, -201-- Replace 12,200 landings
(e) Right Trunnion Support 6613056-4, -6, -202-- Replace 12,200 landings
(f) Fork 5542300-2 -- Replace 13,800 landings
(g) Piston Weld Assembly 6642100-2, -3 -- Replace 13,800 landings
(h) Actuator 9912120-1, -2, -3, -4 -- Replace 23,900 landings
NOTE: For convenience, a cross reference between Cessna part number and Vendor part number is
provided.
Cessna Number Vendor Number Vendor Name
9912120-1 2-7406-2 Decoto
1523200-3 Teijin Seiki
(2) Main Landing Gear (United States Certified)
NOTE: Attached hardware, which includes the bolts, bearings, bushings, trunnion pins, and trunnion/link
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Model S550 Maintenance Manual (Rev 21)
5-11-00 (Rev 21)
pins, related to the installation of the components below must be replaced when the related
component is replaced. Refer to Chapter 32 for more information.
(a) Left Main Landing Gear Assembly and Attaching Hardware 6641000-3, 19, -207 -- Replace 25,800 landings
(b) Right Main Landing Gear Assembly and Attaching Hardware 6641000-4, -20, -206 -- Replace 25,800 landings
(c) Torque Link Bolt 5541220-2 -- Replace 21,500 landings
(d) Sidebrace Actuator 9912111-1, -2, -3, -4 -- Replace 25,800 landings
NOTE: For convenience, a cross reference between Cessna part number and Vendor part number is
provided.
Cessna Number Vendor Number Vendor Name
9912111-1 2-7442-31 Decoto
523100-3 Teijin Seiki
9912111-2 2-7442-4 Decoto
1523100-4 Teijin Seiki
(3) Pneumatic Blowdown/Emergency Brake Bottle
(a) 9912103-1 Manufactured by Tavco. Replace -- 15 Years
NOTE: Bottle may be returned to manufacturer for recertification for an additional period at year 15
and year 18, but has an absolute life of 20 years.
(b) 9912103-2 Manufactured by Globe Engineering (Globe part number 111974-1). Replace -- 20 Years
(c) 9912103-3 Manufactured by Globe Engineering (Globe part number 111974-2). Replace -- 20 Years
(d) 9912103-3 Manufactured by HTL Advanced Technology/ Pacific Scientific. (Part Number 212940-2). Replace -- 24
Years
H. Lighting (Chapter 33)
(1) CAN/AC/12R Lighted Exit Sign -- Replace Every 6 Years
(2) CAN/AC/12RGA Lighted Exit Sign -- Replace Every 6 Years
I. Navigation (Chapter 34).
(1) CD-3510-A (Area Nav R3500) Battery - 3 Years
J. Oxygen (Chapter 35).
(1) Cylinder with DOT Rating of DOT3HT1850. Replace -- 24 Years
(2) Cylinder with DOT Rating of DOT3FC1850 or manufactured under DOT-SP-8162. Replace -- 15 Years
(3) Oxygen cylinder hydrostatic tests intervals are shown below. Refer to Table 2, Hydrostatic Test Intervals.
Table 2. Hydrostatic Test Intervals
DOT Cylinder Last Retest Next Retest Subsequent Retest Refer to Task
Marking Interval
SP 8162 On or After July 1, 60 calendar months 60 Calendar Months 35-11-00-780
2006 after last hydrostatic
test
3HT1850 or 3FC1850 N/A N/A 36 Calendar Months 35-11-00-780
(4) Oxygen mask, Scott EROS Overhaul -- 6 Years
NOTE: Under normal environmental conditions and use, the masks must be overhauled every 6 years. If
masks are exposed to environments that accelerate aging of elastomer components, periodic
inspection may warrant shorter intervals between overhaul periods. Refer to Scott/EROS MA/MC
Series Quick-Donning Mask-Regulator Assembly Operating Instruction booklet, part number
89201-01 for overhaul.
K. Powerplants (Chapter 71).
(1) Engine Mounts or Engine Mount Isolators (Forward and Aft) - Overhaul Engine mount to replace engine mount isolator or
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Model S550 Maintenance Manual (Rev 21)
5-11-00 (Rev 21)
replace entire engine mount. For Engine Mount Isolator replacement, refer to Lord APE83-007 Maintenance Manual for L-
4200 Engine Mounting System -- Coincide with Engine overhaul. Refer to the applicable publication given in the
Introduction, Supplier Publication List.
(2) (Refer to Pratt and Whitney, of Canada, Engine Manual. Refer to the applicable publication given in the Introduction,
Supplier Publication List.)
NOTE: Refer to the latest issue of the Pratt and Whitney Engine Service Bulletin S.B. No. 7003, "Engine
Operating Time Between Overhauls and Hot Section Inspection Frequency", for hot section and
time between Overhaul interval of various configurations of JT15D-4 Engine.
L. Starting (Chapter 80).
(1) Starter- Generator Overhaul -- 1000 hours
(2) Starter-Generator bearings (Starter-Generators prior to mod B not incorporating Lucas Aerospace Service Bulletin
23085-004-24-01). Replace -- 500 hours
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