TB 20 MAINTENANCE MANUAL 05 TIME LIMITS MAINTENANCE CHECKS TB20飞机维护手册 05 时间限制维护检查 2(19)

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 3) Check expiry dates of life-limited parts : 000  
 - airframe - refer to 04-00-00 1 and 05-50-05 601, - equipment and hoses - refer to 05-10-00 1.   
12-20 4) Clean exterior surface. Inspect for corrosion - refer
to 12-20-03 201. 000  
 5) Perform a test run-up. Record parameters (at engine start) - refer to 05-30-02 201. 000  
21-20 6) Perform an operational test of NACA inlet and air outlet blanking flaps. 200  
21-55 7) During the time the vapor cycle cooling system (if installed) is not used, run the compressor for 10 minutes, with engine at idle speed. 000 1 month 
21-55 8) Perform a functional test and a performance test of the vapor cycle cooling system (if installed) - refer
to 21-55-00 501. 000  
21-55 9) Check the level of the refrigerant on the sight indicator of the vapor cycle cooling system (if installed) - refer
to 12-15-03 301. 200  
72-30 10) Measure and record the cylinder compression values in the engine log book - refer to the latest issue of 100  
 LYCOMING Service Instruction No. 1191.   
71-10 11) Remove upper engine cowling 121 and lower engine cowling 131. Visually inspect for cracks, wear, evidence of leaks (oil, fuel, air, exhaust gas) and security - refer to 71-10-01 201. 100  

AIAA
Validity : S / N 1 - 9999 05-20-05 (JA) Page 201
JUN 01
 

ATA "80A" MAJOR INSPECTION
PRELIMINARY STEPS AREA OTHER
INSPECTION PERFORMED
BY
12-10 12) Drain the oil system - refer to 1 2-1 2-02 301, replace the filter - refer to 79-20-02 201, clean the strainer of crankcase - refer to 79-10-02 201. 100 First engine
10 hrs and
25 hrs or 
 NOTE : Before discarding the filter and cleaning the strainer, check that there are no metal particles in the folds.
50 hrs or  4 months then every
4 months 
 Close the drain cock and service the oil tank - refer
to 12-12-01 301 and to the latest issue of LYCOMING   
 SB 480.   
72-30 13) Check for oil leaks around the rocker-box covers. If necessary replace the seal and torque screws - refer to 20-00-01 201. 100  
72-30 14) Check that there is no evidence of overheat on the cylinders, indicated by burnt paint. In this case a fault exists inside the cylinder, and this must be repaired before returning the aircraft to service. 100  
72-30 15) Marked discoloration and seepage around the cylinder heads and cylinder barrel joints are usually due to the seepage of threading grease used at the factory for assembly of the cylinder or to slight gazeous leaks which will disappear once the cylinder has been operated for some time. 100  
　
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