(3) If there is no external contamination:
- if the oil level in the oil reservoir is above the FULL mark on the oil sight glas, correct it with the overflow drain tool (Ref. AMM TASK 49-90-00-600-007).
NOTE : If the APU oil reservoir was filled above the FULL mark on the
____ oil sight glass: During APU operation the oil expands which could create an over-filled condition, resulting in leakage and possible oil smell in the cabin.
- remove the APU Bleed-Air Duct Elbow (Ref. AMM TASK 49-11-11-000-004),
- remove the Load Control Valve P12 (Ref. AMM TASK 49-51-51-000-004).
- examine the removed components with a black light lamp and make sure that you do not find signs of contamination.
「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 : 001-049, 101-105, 107-107, 151-154, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page B236
201-207, Config-1 Aug 01/05 CES
(a) If there are signs of contamination:
- clean the APU Bleed-Air Duct Elbow and install it (Ref. AMM TASK 49-11-11-400-004),
- clean the Load Control Valve P12 and install it (Ref. AMM TASK 49-51-51-400-004).
1 If the fault continues:
_
- replace the AUXILIARY POWER UNIT (4005KM) (Ref. AMM TASK 49-11-11-000-004) and (Ref. AMM TASK 49-11-11-400-004).
**ON A/C 001-049, 101-105, 151-199, 201-210,
Post SB 49-1062 For A/C 001-049,101-105,151-154,201-207,
A. If you smell fumes in the cabin during the pre-conditioning with the APU and there is no oil smoke on the exhaust during the operation of the APU.
NOTE : Do the cleaning and testing as given in the Para. 4.C. after each
____ repair step during the fault isolation. If you fail to do this, the fault may continues.
- examine the outer and inner surfaces and the flexible seals on the air intake diffuser and elbow and make sure that they are clean,
- examine the surfaces of the air intake diverter and the air inlet duct and make sure that they are clean,
- examine the surfaces and the flexible seals of the APU access doors and make sure that they are clean.
NOTE : Do the checks with a black light lamp.
____ Make sure that there is no contamination of oil, fuel, grease, other unwanted material and/or remaining signs of contamination.
(1) If there is contamination of oil, fuel or grease on the outer and/or inner surfaces of the air intake system components and/or the APU access doors:
- identify the type of contamination and the area of the source,
- examine the plumbing/tubing and the APU component interfaces in that area for leaks.
NOTE : If necessary, do the checks with a black light lamp.
____
Do the check very carefully on the:
- OIL COOLER (8079KM),
- OIL PUMP ASSY (8080KM),
- APU GENERATOR (8XS),
- FUEL CONTROL UNIT (8022KM),
- INLET GUIDE-VANE ACTUATOR (8014KM).
NOTE : If you cannot identify the leak(s) when the APU does not
____
operate:
- start and operate the APU with no bleed air supply and no APU generator load (Ref. AMM TASK 49-00-00-710-010),
「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 : 001-049, 101-105, 107-107, 151-199, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page B237
201-210, Config-1 Aug 01/05 CES
- let the APU operate for 15 minutes for thermal stabilazation,
- do a leak check on the APU with a black light lamp,
- do the APU shutdown (Ref. AMM TASK 49-00-00-710-010),
- immediately after the APU has stopped, examine the APU carefully with a black light lamp to identify the leak(s).
(a) If there is a presence of oil at the Load Compressor Cavity drain.
- Replace the APU (Ref. AMM TASK 49-11-11-000-004) and (Ref. AMM TASK 49-11-11-400-004).
(b) If there is a leak on the plumbing/tubing:
- do the repair and replace the tubes, the connectors and the seals as necessary.
(c) If there is oil leakage in the area of the cooling fan:
- replace the seals and/or the COOLING FAN (8079KM) (Ref. AMM TASK 49-52-51-000-002) and (Ref. AMM TASK 49-52-51-400-002) as necessary.
(d) Remove the cooling-fan discharge-duct (Ref. AMM TASK 49-52-51-000-002) and examine if there is oil contamination inside the duct. If there is oil contamination inside cooling-fan discharge duct and the inside of the APU inlet plenum is clean:
- do a further inspection of the cooling fan.
