R (b) If the resistance values are in the specified limits:
R - do a check of the wiring of the oil inlet and outlet
R temperature-sensors (Ref. ASM 24-21/01) for an open circuit, a
R short to ground or a short to shield condition between:

R . pin B/7 of the IDG 2 and pin A/9C of the GCU 2

R . pin B/8 of the IDG 2 and pin A/9D of the GCU 2

R . pin B/9 of the IDG 2 and pin A/10C of the GCU 2

R . pins A/9C and A/10D of the GCU 2 (do a check for a short to R shield)

R . pins A/9D and A/10D of the GCU 2 (do a check for a short to R shield)

R . pins A/10C and A/10D of the GCU 2 (do a check for a short to R shield).

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R  1_  If the wiring is not correct:
R  - repair or replace as necessary. 
R  2_  If the wiring is correct:
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  3_  If the fault continues:
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  B. After the subsequent flight, make sure that the fault does not continue.

R TASK 24-00-00-810-814

R Failure of the Oil Temperature Sensors of the IDG 1 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 24-21/01
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.
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R A. If the fault symptom is identified by the CFDS message IDG1 (E1-4000XU) R TEMP SENSE/ GCU1 (1XU1):
R NOTE : The CFDS message IDG1 (E1-4000XU) TEMP SENSE/ GCU1 (1XU1) can come
____ R into view if the electrical connector B is disconnected from the R IDG and the 28VDC backup power supplies the related GCU. Before R you do the trouble shooting procedure for this CFDS message, make R sure that the electrical connector B is not disconnected.
R - do an electrical resistance test of the inlet and outlet oil R temperature-sensors of the IDG 1 (Ref. ASM 24-21/01) between:
R . pin B/7 and pin B/8 (100 ohms plus or minus 10 ohms at the ambient R temperature of the IDG case)

R . pin B/8 and pin B/9 (100 ohms plus or minus 10 ohms at the ambient R temperature of the IDG 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 inlet and outlet oil
R temperature-sensors (Ref. ASM 24-21/01) for an open circuit
R condition between:

R . pin B/7 of the IDG 1 and pin A/9C of the GCU 1

R . pin B/8 of the IDG 1 and pin A/9D of the GCU 1

R . pin B/9 of the IDG 1 and pin A/10C of the GCU 1.