- do the cleaning and testing as given in the Para. 4.C..
(1) If the fault continues:
- replace the APU AUXILIARY POWER UNIT (4005KM) (Ref. AMM TASK 49-11-11-000-001) and (Ref. AMM TASK 49-11-11-400-001).
B. Cleaning and Testing
(1) If dirty, clean the APU externally (Ref. AMM TASK 49-20-00-100-001).
NOTE : If an external leak was identified on the APU:
____
- do the repair,
- clean the area,
- start and operate the APU with no bleed air supply and no APU generator load (Ref. AMM TASK 49-00-00-710-004),
- let the APU operate 15 minutes for thermal stabilization,
- do a leak check on the APU with a black light lamp,
- do the APU shutdown (Ref. AMM TASK 49-00-00-710-004),
- immediately after the APU has stopped, examine the area carefully and make sure that there is no leak,
- if there is a leak (the repair was not succesful), do the repair and/or replace as necessary.
- if there is no leak (the repair was successful), continue as
given subsequent. If no external leak was identified on the APU, do the procedure as given subsequent.
(2) If dirty, clean the APU compartment (Ref. AMM TASK 49-00-00-100-001).
(3) If dirty, clean the air intake diverter, the air inlet duct and the air intake diffuser and elbow (Ref. AMM TASK 49-16-00-100-001).
(4) Do a check and make sure that the flexible seals on the air intake system are in correct condition (Ref. AMM TASK 49-16-00-210-001) and clean.
(5) Do the cleaning of the APU compressors (Ref. AMM TASK 49-20-00-100-001).
(6) Clean the APU bleed air duct, the pneumatic ducts of the aircraft and the environmental control system (Ref. AMM TASK 21-00-00-615-001) or (Ref. AMM TASK 21-00-00-615-002) and (Ref. AMM TASK 21-00-00-100-001).
(7) Do the pre-conditioning with the APU (Ref. AMM TASK 12-33-21-618-001) and make sure that you do not smell fumes in the cabin and/or there is no oil smoke at the APU exhaust.
- if you smell fume in the cabin, do the applicable trouble shooting procedure(Ref. TASK 49-00-00-810-846).
(8) Do a leak check and make sure that there is no fuel leak and/or no oil leak on the APU and/or the APU generator.
NOTE : Do the leak check with a black light lamp.
____ TASK 49-00-00-810-852
APU Generator electrical-parameter indication(s) replaced by amber XX (GTCP 36-300)
1. Possible Causes
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- GCU-APU (1XS)
- EGIU-2 (22XU2)
- connection between the EGIU-2 (22XU2) and the SDAC 1 and 2 (1WV1(2)) and/or the APU GCU (1XS)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-22-00-810-808 APU GEN Voltage, Frequency and Load Indication Lost
or Incorrect AMM 24-22-33-000-001 Removal of the EGIU-1(2) (22XU1, 22XU2) AMM 24-22-33-400-002 Installation of the EGIU-1(2) (22XU1, 22XU2) AMM 24-23-34-000-001 Removal of the GCU-APU (1XS) AMM 24-23-34-400-001 Installation of the GCU-APU (1XS) AMM 49-00-00-710-004 Operational Test of the APU (4005KM) (GTCP 36-300)
3. Fault Confirmation
__________________
A. Do the operational test of the APU (Ref. AMM TASK 49-00-00-710-004). Do a check of the APU GEN electrical-parameter indications on the lower ECAM DU (APU Page).
4. Fault Isolation
_______________
A. Maintenance Action
(1) If all electrical parameter indications are replaced by amber XX:
- do the trouble shooting of the connection between the EGIU-2 (22XU2) and the SDAC 1 and 2 (1WV1(2)) and/or the APU GCU (1XS) (Ref. TASK 24-22-00-810-808).
(2) If one or two electrical parameter indications are replaced by amber 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 机载辅助动力 1(69)
