R (2) If the resistance values are in the specified limits:
R - do a check of the wiring of the outlet oil temperature-sensor (Ref.
R ASM 24-21/01) for an open circuit, a short to ground or a short to
R 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 . pins A/9C and A/10D of the GCU 2
R . pins A/9D and A/10D 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 GCU-2 (1XU2) (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 2 IDG (4000XU) (Ref. AMM TASK 24-21-51-
R 000-040) and (Ref. AMM TASK 24-21-51-400-040).
R B. When you replace a component or repair the wiring:
R - do the subsequent flight before you do the check of the Class 3 Faults
R of the GAPCU from the CFDS to make sure that the system operates
R correctly.
R If the test continues to give the fault message, continue the trouble
R shooting procedure.
R TASK 24-00-00-810-812
R High-Delta Temperature Condition of the IDG 1 Oil Sensors 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 12-13-24-612-041 R R AMM 24-21-00-210-044 R AMM 24-21-00-210-046 R R AMM 24-21-00-720-041 R R AMM 24-21-00-920-040 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 ASM 24-21/01
R 3. Fault Confirmation
__________________
R A. Test IDG Servicing - Filling of the IDG with Oil or Addition of Oil after a Level Check Inspection of the Filter Element(s) Check of the Oil Level and Oil-Filter Differential-Pressure Indicator (DPI) Operational Test of the IDG Disconnect and Reconnect (Reset) Function - Engine in Operation Drain IDG Oil System, Discard Filter Element(s) and Replenish 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)
R (1) Not applicable, you cannot confirm this fault on the ground.
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.
R A. If the fault symptom is identified by the CFDS message IDG1 (E1-4000XU)
R OIL DELTA TEMP/ GCU1 (1XU1):
R - do a check of the Differential Pressure Indicator (DPI) of the IDG 1
R (Ref. AMM TASK 24-21-00-210-046).
R (1) If the DPI is extended:
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 DPI is not extended:
R - do an inspection of the IDG 1 charge and scavenge filters (Ref. AMM
R TASK 24-21-00-210-044).
R (a) If there is contamination of the IDG 1 charge and scavenge
R filters:
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 there is no contamination of the IDG 1 charge and scavenge
R filters:
R - replace the IDG 1 charge and scavenge filters (Ref. AMM TASK
R 24-21-00-920-040)
R - add oil (Ref. AMM TASK 12-13-24-612-041)
R - do the operational test of the IDG 1 disconnect and reconnect
R function (with the engine in operation) (Ref. AMM TASK 24-21-R 00-720-041).
R (3) If the fault continues:
R - do a check of the resistance of the oil inlet and outlet
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 R ambient temperature of the IDG case)
R . pin B/8 and pin B/9 (100 ohms plus or minus 10 ohms at the R ambient temperature of the IDG case).
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).
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