R TASK 24-20-00-810-922

R Failure of the IDG 1 Neutral Feeder R 1. Possible Causes
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R - IDG (4000XU) R - GCU-1 (1XU1) R - neutral feeder
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
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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
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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 C203
 Aug 01/05 CES

R  A. If the fault symptom is identified by the CFDS message WRG: GEN1 NEUTRAL 
R  FEEDER/ IDG1 (E1-4000XU) and the upper ECAM-DU warning GEN 1 FAULT: 
R  - do a check of the neutral feeder for an open circuit or a high 
R  resistance between terminal N of the IDG 1 and the airframe ground (all 
R  connection points) (Ref. ASM 24-22/01). 
R  (1) If the feeder is not correct: 
R  - repair or replace the neutral feeder as necessary. 
R  (2) If the feeder is correct: 
R  - do a check of the resistance of the main stator windings of the IDG 
R  1 (Ref. ASM 24-22/01) between: 
R  . terminals T1 and N (7 milliohms plus or minus 1 milliohm) 
R  . terminals T2 and N (7 milliohms plus or minus 1 milliohm) 
R  . terminals T3 and N (7 milliohms plus or minus 1 milliohm). 
R  (a) If the resistance values are out of the specified limits: 
R  - replace the engine 1 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  - 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-
R  002). 
R  (4) Start the engine 1 (Ref. AMM TASK 71-00-00-710-003).

 「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 C204
 Aug 01/05 CES

R (5) Do this test:

R  -------------------------------------------------------------------------------
R  ACTION  RESULT 
R  -------------------------------------------------------------------------------
　
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