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R  and (Ref. AMM TASK 24-41-34-400-001). 
R  B. Make sure that the aircraft electrical circuits operate correctly in APU 
R  configuration. 
R  (1) Energize the aircraft electrical circuits from the APU (Ref. AMM TASK 
R  24-41-00-861-002). 
R  (2) Let the APU generator operate for five minutes to make sure that it 
R  operates correctly. 
R  (3) De-energize the aircraft electrical circuits from the APU (Ref. AMM 
R  TASK 24-41-00-862-002).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 401-499, ∞∞24-23-00∞∞∞∞∞∞∞∞∞∞Page 224
 Aug 01/05 CES

R TASK 24-23-00-810-812

R Failure of the APU Ready Circuit R 1. Possible Causes
_______________
R - GAPCU (24XG)
R - GEN-APU (8XS)
R - RELAY-APU AVAIL (6KD)
R - wiring

R 2. Job Set-up Information

______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 24-23-51-000-001 R AMM 24-23-51-400-001 R AMM 24-41-00-740-002 R AMM 24-41-34-000-001 R R AMM 24-41-34-400-001 R R ASM 24-23/02 R ASM 49-61/01
R 3. Fault Confirmation
__________________
R A. Test Removal of the APU Generator 8XS Installation of the APU Generator 8XS Operational Check of GAPCU via CFDS Removal of the Ground Auxiliary Power Control Unit (GAPCU) (24XG) Installation of the Ground Auxiliary Power Control Unit (GAPCU) (24XG)
R (1) Do the trouble shooting for all CFDS messages related to the Chapter
R 49 or to the ECB that can come into view with the CFDS message GEN
R APU (8XS)/ GAPCU (24XG)/ APU CTL RLY (6KD)

R (2) If no Chapter 49 or ECB-related CFDS messages come into view, or if
R the fault continues after the troubleshooting:
R - do a BITE test of the GAPCU (Ref. AMM TASK 24-41-00-740-002).

R (a) If the BITE test gives the message TEST FAILED:
R - do the trouble shooting given in Para 4.A.

R (b) If the BITE test gives the message TEST PASSED:
R - do the trouble shooting given in Para 4.B.

 

R  4. Fault Isolation_______________ 
R  A. If the BITE test gives the message TEST FAILED: 
R  - push the line key adjacent to the TEST FAILED message. 
R  (1) If the maintenance message GAPCU (24XG) comes into view: 
R  - replace the GAPCU (24XG) (Ref. AMM TASK 24-41-34-000-001) and (Ref. 
R  AMM TASK 24-41-34-400-001). 
R  B. If the BITE test gives the message TEST PASSED: 
R  - replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) and (Ref. 
R  AMM TASK 24-23-51-400-001). 
R  (1) If the fault continues: 
R  - do a check of the wiring and the contact of the APU ready circuit 
R  (Ref. ASM 49-61/01) and (Ref. ASM 24-23/02) for a short to 28VDC 
R  between: 
R  . pin B/6J of the ECB (59KD) and pin A/X1 of the APU AVAIL relay 
R  (6KD) 
R  . pin A/7C of the GAPCU and pin A/A1 of the APU AVAIL relay 
R  . pins A/A1 and A/A2 of the APU AVAIL relay (normally open). 
R  (a) If the wiring or contact are not correct: 
R  - repair or replace the wiring as necessary 
R  - replace the RELAY-APU AVAIL (6KD) as necessary. 
R  (b) If the wiring or contact are correct: 
R  - replace the GAPCU (24XG) (Ref. AMM TASK 24-41-34-000-001) and 
R  (Ref. AMM TASK 24-41-34-400-001). 
R  C. Do the test given in para. 3.

R TASK 24-23-00-810-813

R Failure of the APU Generator Exciter-Field or its Wiring R 1. Possible Causes
_______________
R - GEN-APU (8XS) R - GAPCU (24XG) R - wiring
R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 24-23-51-000-001 R AMM 24-23-51-400-001 R AMM 24-41-00-861-002 R R AMM 24-41-00-862-002 R R AMM 24-41-34-000-001 R R AMM 24-41-34-400-001 R R AMM 49-91-41-200-001 R R AMM 49-91-41-200-002 R R AMM 49-91-41-920-001 R R AMM 49-91-45-200-002 R ASM 24-23/01
R 3. Fault Confirmation
__________________
R A. Test
R Not applicable.

Removal of the APU Generator 8XS Installation of the APU Generator 8XS Energize the Aircraft Electrical Circuits from the APU De-energize the Aircraft Electrical Circuits Supplied from the APU Removal of the Ground Auxiliary Power Control Unit (GAPCU) (24XG) Installation of the Ground Auxiliary Power Control Unit (GAPCU) (24XG) Remove and discard Alternator Scavenge Filter Element (8069KM) (GTCP 36-300) Inspection and Replacement of Oil Filters (8069KM) and (8076KM) (131-9(A)) Remove and Discard Pressure Oil Filter-Element (8076KM) (APS 3200) Remove and discard Lube Filter Element (GTCP 36-300)
　
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