- do a check for signs of oil, fuel and other unwanted material on the internal areas of the air inlet duct and the air intake diffuser and elbow,
- do a check for signs of oil and/or fuel on the external areas and the flexible seals on the air intake diffuser and elbow,
- do a check for signs of oil and/or fuel in the APU access doors.
(1) If you find signs of oil and/or fuel in the external and/or the internal areas of the air inlet duct, the air intake diffuser and elbow and/or the APU access doors:
- follow the signs of the oil and/or fuel and check the external of the APU in that area for leaks from there the oil and/or fuel came.
NOTE : Do the check very carefully on the:
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- plumbing,
- PMG and COOLING FAN ASSEMBLY (8055KM),
- OIL COOLER,
- oil pump assembly,
- oil filler cap and scupper,
- pressure fill and overflow ports,
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 106-106, 108-149, 211-299, 301-399, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page 283
Config-2 Aug 01/05 CES
- GEN-APU 8XS
- Oil Pressure Switch.
(a) If you find a leak on the plumbing:
- do the repair and replace the tubes, connectors and packings as necessary.
(b) If you find leak oil in the area of the PMG and cooling fan assembly:
- replace the PMG and COOLING FAN ASSEMBLY (Ref. AMM TASK 49-52-53-000-001) and (Ref. AMM TASK 49-52-53-400-001).
(c) If you find leak oil in the area of the oil cooler:
- replace the OIL COOLER (Ref. AMM TASK 49-91-44-000-003) and (Ref. AMM TASK 49-91-44-400-003) and/or the packings of the oil line connectors as necessary.
(d) If you find that the oil filler cap is not tight:
- make sure that the oil level in the oil reservoir is not more than the FULL mark on the sight glass and correct it with the overflow drain tool if necessary (Ref. AMM TASK 49-90-00-600-004).
- make sure that the oil filler cap and the packing are in the correct condition and replace them if necessary,
- make sure that the oil scupper packing seals correctly and replace if it necessary.
(e) If you find that the valves of the pressure fill and overflow ports are not tight:
- replace the valves as necessary.
(f) If you find leak oil in the area of the oil pump assy:
- replace the packings as necessary or replace the AUXILIARY POWER UNIT (4005KM).
(g) If you find leak oil in the area of the APU generator:
- replace the GEN-APU 8XS and/or the SEALING PLATE as necessary (Ref. AMM TASK 24-23-51-000-001) and (Ref. AMM TASK 24-23-51-400-001).
(h) If you find leak oil in the area of the oil cooler:
- replace the Oil Pressure Switch (Ref. AMM TASK 49-94-14-000-002) and (Ref. AMM TASK 49-94-14-400-002) and/or the packings of the oil line connectors as necessary.
(i) If the fault continues:
- replace the AUXILIARY POWER UNIT 4005KM (Ref. AMM TASK 49-11-11-000-003) and (Ref. AMM TASK 49-11-11-400-003).
(2) If you find other unwanted material in the internal areas of the air inlet duct, the air intake diffuser and elbow:
- make sure what material it is and where it came from,
- if you think that the unwanted material has damaged the APU compressors, do the boroscope inspection of the compressors (Ref. AMM TASK 49-20-00-290-001).
(a) If the fault continues:
- replace the AUXILIARY POWER UNIT (4005KM) (Ref. AMM TASK 49-11-11-000-003) and (Ref. AMM TASK 49-11-11-400-003).
B. If you see oil smoke at the exhaust during the operation of the APU:
- replace the APU AUXILIARY POWER UNIT (4005KM) (Ref. AMM TASK 49-11-11-000-003) and (Ref. AMM TASK 49-11-11-400-003).
C. Cleaning and Testing
WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT
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BURNS WHEN YOU DO THE MAINTENANCE TASK(S).
(1) Clean the APU (Ref. AMM TASK 49-00-00-100-002),
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