Removal of the Integrated Drive Generator -IDG 1(2),(4000XU) Installation of the Integrated Drive Generator -IDG 1(2),(4000XU) Removal of the GCU-1(2) (1XU1, 1XU2) Installation of the GCU-1(2) (1XU1, 1XU2) Operational Check of GAPCU via CFDS Energize the Aircraft Electrical Circuits from the External Power De-energize the Aircraft Electrical Circuits Supplied from the External Power EIS Start Procedure EIS Stop Procedure Engine Automatic Start Engine Shutdown
R NOTE : As the GEN 2 was set to OFF because of a true failure, the fault
____ R confirmation is not necessary.
R 4. Fault Isolation
_______________
R CAUTION : BEFORE YOU START THE CHECK OF IDG WIRING THAT INCLUDES CONNECTORS,
_______ R EXAMINE EACH CONNECTOR TO MAKE SURE THAT THERE IS NO OIL IN IT. R IF YOU FIND OIL, CLEAN THE CONNECTOR AND CONNECT IT AGAIN. R IF THE FAILURE CONTINUES, DO THE TROUBLE SHOOTING PROCEDURE AS R GIVEN BELOW.
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R A. If the fault symptom is identified by the CFDS message IDG2 (E2-4000XU)/
R GCU2 (1XU2) and the upper ECAM DU warning GEN 2 FAULT:
R (1) Do the trouble shooting for all ECU messages that come into view with
R the CFDS message IDG2 (E2-4000XU)/ GCU2 (1XU2).
R (a) If there are no ECU messages, or if the fault continues after the
R trouble shooting for ECU messages:
R - replace the engine 2 IDG (4000XU) (Ref. AMM TASK 24-21-51-000-R 040) and (Ref. AMM TASK 24-21-51-400-040).
R (b) If the fault continues:
R - replace the GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-000-001) and
R (Ref. AMM TASK 24-22-34-400-001).
R (2) Do the 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 - push the line key adjacent to the TEST FAILED message.
R 1_ If the maintenance message GCU2 (1XU2) comes into view:
R - replace the GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-000-001)
R and (Ref. AMM TASK 24-22-34-400-001).
R (b) If the BITE test gives the message TEST PASSED:
R - do an electrical resistance test of the IDG 2 servo-valve
R speed-control (Ref. ASM 24-21/01) between pin B/1 and pin B/2
R (75 ohms plus or minus 6 ohms).
R 1_ If the resistance values are out of the specified limits:
R - replace the engine 2 IDG (4000XU) (Ref. AMM TASK 24-21-51-R 000-040) and (Ref. AMM TASK 24-21-51-400-040).
R 2_ If the resistance values are in the specified limits:
R - do a check of the wiring of the servo-valve speed control
R (Ref. ASM 24-21/01) for a short to ground, a short circuit,
R an open circuit or a high resistance condition between:
R . pin B/1 of the IDG 2 and pin B/11J of the GCU 2
R . pin B/2 of the IDG 2 and pin B/11H of the GCU 2.
R a_ If the wiring is not correct:
R - repair or replace as necessary.
R b_ If the wiring is correct:
R - replace the engine 2 IDG (4000XU) (Ref. AMM TASK 24-21-R 51-000-040) and (Ref. AMM TASK 24-21-51-400-040).
R c_ If the fault continues:
R - replace the GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-000-001)
R and (Ref. AMM TASK 24-22-34-400-001).
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R (3) Do an electrical resistance test of the IDG 2 exciter field between
R pins A/9 and A/10 (8.4 ohms plus or minus 0.84 ohms) (Ref. ASM 24-R 22/01).
R (a) If the resistance values are out of the specified limits:
R - replace the engine 2 IDG (4000XU) (Ref. AMM TASK 24-21-51-000-R 040) and (Ref. AMM TASK 24-21-51-400-040).
R (b) If the resistance values are in the specified limits:
R - do an electrical resistance test of the IDG 2 PMG stator (Ref.
R ASM 24-22/01) between:
R . pins B/12 and B/13 (1 ohm plus or minus 0.05 ohm)
R . pins B/12 and B/14 (1 ohm plus or minus 0.05 ohm)
R . pins B/13 and B/14 (1 ohm plus or minus 0.05 ohm).
R 1_ If the resistance values are out of the specified limits:
R - replace the engine 2 IDG (4000XU) (Ref. AMM TASK 24-21-51-
R 000-040) and (Ref. AMM TASK 24-21-51-400-040).
R 2_ If the resistance values are in the specified limits:
R - do a check of the wiring of the PMG stator and exciter field
R (Ref. ASM 24-22/01) for a short to ground, a short circuit
R or an open circuit between:
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本文链接地址：A320 Trouble Shooting Manual 排故手册 电源 2(121)
