Piper Dakota Maintenance Manual page 33

PERIODIC INS7PECTIONS (cont)
NOTES:
1. All inspections or operations are required at each inspection interval as indicated by a (O). Both annual
and l00 hour inspections are complete airplane inspections, and are identical in scope. The 500 and
100 hour inspections are extensions of the annual or l00 hour inspection, but require a more detailed
examination of the airplane, and overhaul or replacement of some major components. Inspections must
be accomplished by persons authorized by the FAA.
2. Piper service bulletins are of special importance and must be complied with promptly.
3. Piper service letters are product improvements and service hints pertaining to servicing. Service letters
should be given careful attention.
4. Power plant inspections are based on the engine manufacturers operators manual.
5. Intervals between oil changes can be increased as much as 100% provided the full flow cartridge type
oil filter element is replaced each 50 hours of operation and the specified octane fuel is used. If fuel
other than specified octane rating for the power plant is used, refer to latest revision of Ly c o m i n g
Service Letter No. Ll85 for additional information and recommended service procedures.
6. For engine overhaul, refer to the latest revision of Lycoming Service Letter No. 20l.
7. Replace flexible oil lines as required per latest revision of Lycoming Service Bulletin No. 240.
8. Do not check compressor oil level unless a freon leak has occurred.
9. Clean any traces of oil from clutch surface.
10. Check security and condition of autopilot servo bridle cables, clamps, and shear pin in accordance
with the latest revision of Piper Service Letter No. 695.
11. Remove the rocker box covers after every 400 hours of engine operation, and check for freedom of
valve rockers when valves are closed. Check 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 components must be removed (including the piston and connecting rod assembly). Inspect for
further damage. Replace any parts that do not conform to limits shown in the latest revision for
Lycoming Service Table of Limits No. SSPl776.
12. Check cylinders for evidence of excessive heat. This condition is indicative of internal damage to the
cylinder. If found, determine and correct its cause 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, or by slight gas leakage which
stops after the cylinder has been in service for awhile. This condition is neither harmful nor
detrimental to engine performance and operation. If proven that leakage exceeds these conditions,
replace the cylinder.
13. Check throttle body attaching screws for tightness. The correct torque for these screws is 40 to 50
inch-pounds.
14. When using alternate fuels, refer to latest revision of Lycoming Service Letter No. L185 for additional
information and recommended service procedures.
15. Replace fuel tank vent line flexible connections as required. Time in service must not exceed 1000
hours.
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
1B9
5 - 21 - 00
Page - 5 - 10
Reissued: August 1, 1986