W DOC AIRBUS | TSM A320F

Failure of the IDG 1 Oil-In Temperature Bulb or its Wiring to the GCU 1

TASK 24-21-00-810-832-A
Failure of the IDG 1 Oil-In Temperature Bulb or its Wiring to the GCU 1

1. Possible Causes
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
ASM 242101
AMM 24-21-51-000-040
Removal of the Integrated Drive Generator - IDG 1(2)
AMM 24-21-51-000-803
Removal of the Integrated Drive Generator - IDG 1(2)
AMM 24-21-51-400-040
Installation of the Integrated Drive Generator - IDG 1(2)
AMM 24-21-51-400-803
Installation of the Integrated Drive Generator - IDG 1(2)
AMM 24-22-34-000-001
Removal of the GCU-1(2)
AMM 24-22-34-400-001
Installation of the GCU-1(2)
AMM 24-41-00-740-002
Operational Check of the GAPCU via the CFDS
3. Fault Confirmation
Subtask 24-21-00-740-054-A ** ON A/C NOT FOR ALL
A. Test
   (1) Read the Class 3 Faults of the GAPCU from the CFDS AMM 24-41-00-740-002.
4. Fault Isolation
CAUTION: BEFORE YOU START THE CHECK OF IDG WIRING THAT INCLUDES CONNECTORS, EXAMINE EACH CONNECTOR TO MAKE SURE THAT THERE IS NO CONTAMINATION IN IT. IF YOU FIND CONTAMINATION, CLEAN THE CONNECTOR AND CONNECT IT AGAIN. IF THE FAILURE CONTINUES, DO THE TROUBLE SHOOTING PROCEDURE AS GIVEN BELOW.
Subtask 24-21-00-810-077-B ** ON A/C NOT FOR ALL
A. If the Class 3 Faults gives the maintenance message IDG1 (E1-4000XU) OIL IN TEMP/ GCU1 (1XU1):
  • do an electrical resistance test of the inlet oil temperature-sensor of the IDG 1 between pins B/8 and B/9 (100 ohms plus or minus 10 ohms at the ambient temperature of the IDG case) ASM 242101.
   (1) If the resistance values are out of the specified limits:
   (2) If the resistance values are in the specified limits:
  • do a check of the wiring ASM 242101 for an open circuit, a short to ground or a short to shield condition between:
    . pin B/8 of the IDG 1 and pin A/9D of the GCU 1
    . pin B/9 of the IDG 1 and pin A/10C of the GCU 1
    . pins A/9D and A/10D of the GCU 1
    . pins A/10C and A/10D of the GCU 1.
     (a) If the wiring is not correct:
  • repair or replace as necessary.
     (b) If the wiring is correct:
       1 If the fault continues:
Subtask 24-21-00-810-077-F ** ON A/C NOT FOR ALL
A. If the Class 3 Faults gives the maintenance message IDG1 (E1-4000XU) OIL IN TEMP/ GCU1 (1XU1):
  • Do a check of the resistance of the oil inlet temperature-sensor of the IDG 1 between pins B/8 and B/9 (100 ohms plus or minus 10 ohms at the ambient temperature of the IDG case) ASM 242101.
   (1) If the resistance values are out of the specified limits:
   (2) If the resistance values are in the specified limits:
  • Do a check of the wiring ASM 242101 for an open circuit, a short to ground or a short to shield condition between:
    . Pin B/8 of the IDG 1 and pin A/9D of the GCU 1
    . Pin B/9 of the IDG 1 and pin A/10C of the GCU 1
    . Pins A/9D and A/10D of the GCU 1
    . Pins A/10C and A/10D of the GCU 1.
     (a) If the wiring is not correct:
  • Repair or replace as necessary.
     (b) If the wiring is correct:
       1 If the fault continues:
Subtask 24-21-00-740-055-A ** ON A/C NOT FOR ALL
B. When you replace a component or repair the wiring:
  • do the subsequent flight before you do the check of the Class 3 Faults of the GAPCU from the CFDS to make sure that the system operates correctly.
    If the test continues to give the fault message, continue the trouble shooting procedure.
[Rev.8 from Aug 2018] 2026.04.04 04:26:32 UTC
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