Piper Navajo Chieftain PA-31-350 Service Manual page 112

NAVAJO CHIEFTAIN SERVICE MANUAL
TABLE III-I. INSPECTION REPORT
NOTES (cont)
7. Refer to Textron Lycoming Service Bulletin 469.
8. See the latest revision of Hartzell Service Letter No. 61. Both propellers must include feather assist
springs at next scheduled propeller overhaul.
9. See Textron Lycoming Service Bulletin No. 480, latest revision.
10. Replace flexible oil and hydraulic lines at 1000 hours time-in-service, or 8 years, whichever comes first
Refer to latest Lycoming Service Bulletin 240.
11. After every 400 hours of engine operation, remove the rocker box covers and check for freedom of valve
rockers when valves are closed. Look for evidence of abnormal wear or broken parts in the area of the
valve tips, valve keeper, springs, and spring seat. If any indications are found, the cylinder and all its
components must be removed (including the piston and connecting rod assembly) and inspected for fur-
ther damage. Replace any parts that do not conform with limits shown in the latest revision of Lycoming
Service Table of Limits No. SSP1776.
12. Check cylinders for evidence of excessive heat which is indicated by burned paint on the cylinders. This
condition is indicative of internal damage to the cylinder and, if found, its cause must be determined and
corrected before the aircraft is returned to service.
Heavy discoloration and appearance of seepage at the cylinder head and barrel attachment area is
usually due to emission of thread lubricant used during assembly of the barrel at the factory, or by slight
gas leakage which stops after the cylinder has been in service for awhile. This condition is neither harm-
ful nor detrimental to engine performance and operation. If it can be proven that leakage exceeds these
conditions, the cylinder should be replaced.
13. Refer to VSP 69.
14. Replace or overhaul as required or at engine overhaul. Refer to latest revision of Lycoming Service
Letter L201 for engine T.B.O.
15. For replacement or inspection of gears in D-3200 series pressurized (blue) magnetos, refer to latest revision
of Lycoming Service Bulletin 459.)
16. Replace flexible fuel supply hose and interconnect hose couplings at time of engine overhaul, or 5 years,
whichever comes first.
17. Change all rubber engine mounts every 500 hours time-in-service.
18. Replace pneumatic lines in engine compartment and nacelle area every 5 years or T.B.O., whichever
comes first.
19. Compressor oil level need not be checked unless a Freon leak has developed and recharging is required.
CAUTION: Environmental regulations require special equipment and procedures be utilized when
charging air conditioning system with freon.
20. Clean any traces of oil from clutch surface.
21 Refer to latest revision of Lycoming Service Bulletin No. 452.
22. Replace any v-band coupling attaching the exhaust tailpipe to the turbocharger at 1000 hour intervals or
sooner if inspection indicates wear, buckling, etc. (Refer to latest revision of Piper Service Bulletin 644.)
23. Refer to latest revision of Piper Service Bulletin 644 for inspection and replacement of turbocharger
exhaust coupling.
24. Refer to Lycoming Service Instruction 1384
25. Remove emergency exit window completely from fuselage to ensure correct operation (refer to section IV).
26. Examine cables for broken strands by wiping a cloth along the length of the cable. Visually inspect the
cable thoroughly for damage not detected by the cloth. Replace damaged cables. Refer Advisory
Circular 43.13-1A, paragraph 198.
Revised: 3/31/94
Interim Revision: 12/30/94
INSPECTION
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