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72-00 45) Perform an overhaul of the engine. 100 Refer to 
    05-10-00  
72-30 46) Check cylinders visually for cracked or broken fins. 100  
72-30 47) Remove the rocker box covers. Check the rockers for freedom of movement when the valves are closed. 100 400 hrs 
72-30 48) Look for evidence of abnormal wear or broken parts in the area of the valve tips, valve keeper, springs and spring seats. If any indications are found, the cylinder and all its components should be removed (including the piston and connecting rod assembly) for further investigation. 100 400 hrs 
72-30 49) Replace any parts that do not conform with limits indicated in the latest issue of LYCOMING SSP 1776. 100 400 hrs 
72-30 50) Apply the latest issue of LYCOMING Service Bulletin 388 about valve guide clearance check. 100 400 hrs 
79-00 51) Visually inspect the lubrication lines and connections on the engine cases and on the oil cooler(s), check the attach fittings and look for impact marks, wear, cracks and leaks. 100  
79-20 52) Check engine crankcase breather for obstruction. 100  
79-30 53) Visually inspect attach fittings, lines, connections,
pressure transmitter and oil temperature probe for routing and condition. 000  
71-60 54) Visually inspect the inlet pipes, the manifolds and their attach fittings. 100  
71-60 55) Visually inspect the hoses (corrugated hoses). 100  
71-60 56) Visually inspect the air filter(s) - refer to the spare filter package instructions. 100  
71-60 57) Replace the air filter(s). 100 1 year 
71-60 58) Visually inspect the deflectors, the inlet box and the air intake flap ; clean if necessary. Inspect for cracks and distortion, and check the attach fittings for condition. 100  
71-60 59) Perform an operational test of the air intake flap. 100  
78-00 60) Remove the heat exchanger and the exhaust pipe (and the muffler, if installed) - refer to 21-40-01 201,
78-00-00 201, 78-20-00 201. 100  

AIAA
Validity : S / N 1 - 9999 05-20-04 Page 215
JUN 01
 

ATA "4A" INSPECTION - 100 HOURS
ENGINE COMPARTMENT INSPECTION (AREA 100) AREA OTHER
INSPECTION PERFORMED
BY
78-00 61) Thoroughly inspect the attach fittings, the tubes, the exhaust pipe, the exchanger (and the muffler, if installed). 100  
 Look for welding defects and cracks on the inner and outer casings - refer to 78-00-00 201.   
　
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