「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, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page B235
 Aug 01/05 CES

R (4) De-energize the aircraft electrical circuits R (Ref. AMM TASK 24-41-00-862-002).

R TASK 24-20-00-810-900

R Failure of the IDG 1 Exciter Field R 1. Possible Causes
_______________
R - IDG (4000XU) R - GCU-1 (1XU1) R - wiring
R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 24-21-51-000-040 R R AMM 24-21-51-400-040 R R AMM 24-22-34-000-001 R AMM 24-22-34-400-001 R AMM 24-41-00-740-002 R AMM 24-41-00-861-002 R R AMM 24-41-00-862-002 R R AMM 31-60-00-860-001 R AMM 31-60-00-860-002 R AMM 71-00-00-710-003 R AMM 71-00-00-710-028 R ASM 24-22/01
R 3. Fault Confirmation
__________________
R A. Test
R Not applicable.

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 1 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, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page B237
 Aug 01/05 CES

R  A. If the fault symptom is identified by the CFDS message IDG1 (E1-4000XU) 
R  EXC FLD/ GCU1 (1XU1) and the upper ECAM-DU warning GEN 1 FAULT: 
R  - do a check of the resistance of the IDG 1 exciter field (Ref. ASM 24-
R  22/01) between: 
R  . pins A/9 and A/10 (8.4 ohms plus or minus 0.84 ohms) 
R  . pin A/9 and IDG case (short circuit of the exciter field to the IDG 
R  case). 
R  (1) If the resistance values are out of the specified limits: 
R  - replace the engine 1 IDG (4000XU) (Ref. AMM TASK 24-21-51-000-040) 
R  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 IDG 1 exciter field (Ref. ASM 24-
R  22/01) for a short to ground, a short circuit or a short to shield 
R  between: 
R  . pin A/9 of the IDG 1 and pin C/12 of the GCU 1 
R  . pin A/10 of the IDG 1 and pin C/13 of the GCU 1 
R  . pins C/12, C/13 and C/7 of the GCU 1 (short to shield of the 
R  exciter field). 
R  (a) If the wiring is not correct: 
R  - repair or replace as necessary. 
R  (b) If the wiring is correct: 
R  - replace the GCU-1 (1XU1) (Ref. AMM TASK 24-22-34-000-001) and 
R  (Ref. AMM TASK 24-22-34-400-001). 
R  1 If the fault continues:_ 
R  - replace the engine 1 IDG (4000XU) (Ref. AMM TASK 24-21-51-
R  000-040) and (Ref. AMM TASK 24-21-51-400-040). 
R  B. Do this operational test to make sure that the system operates correctly. 
R  (1) Aircraft Maintenance Configuration 
R  (a) Energize the aircraft electrical circuits 
R  (Ref. AMM TASK 24-41-00-861-002). 
R  (b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) 
R  (Ref. AMM TASK 31-60-00-860-001). 
R  (2) On the ELEC panel 35VU: 
R  - push, release and push again the GEN 1 pushbutton switch (3XU1). 
R  (3) Do the operational test of the GAPCU (Ref. AMM TASK 24-41-00-740-
　
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