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.
 「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, ∞∞24-21-00∞∞∞∞∞∞∞∞∞∞Page 266
 Aug 01/05 CES

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).

 「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, ∞∞24-21-00∞∞∞∞∞∞∞∞∞∞Page 267
 Aug 01/05 CES

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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