DOC AIRBUS | TSM A320FFailure of the IDG 2 Oil-In Temperature Bulb or its Wiring to the GCU 2
TASK 24-21-00-810-833-A
Failure of the IDG 2 Oil-In Temperature Bulb or its Wiring to the GCU 2
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 24-21-00-740-056-A ** ON A/C NOT FOR ALL 4. Fault Isolation
[Rev.8 from Aug 2018]
2026.04.04 04:26:32 UTC
Failure of the IDG 2 Oil-In Temperature Bulb or its Wiring to the GCU 2
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 |
Subtask 24-21-00-740-056-A ** ON A/C NOT FOR ALL 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 24-21-00-810-078-B ** ON A/C NOT FOR ALL A. If the Class 3 Faults gives the maintenance message IDG2 (E2-4000XU) OIL IN TEMP/ GCU2 (1XU2):
Subtask 24-21-00-810-078-F ** ON A/C NOT FOR ALL - do an electrical resistance test of the inlet oil temperature-sensor of the IDG 2 between pins B/8 and B/9 (100 ohms plus or minus 10 ohms at the ambient temperature of the IDG case) ASM 242101.
- replace the engine 2 IDG [4000XU] AMM 24-21-51-000-040 and AMM 24-21-51-400-040.
- 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 2 and pin A/9D of the GCU 2
. pin B/9 of the IDG 2 and pin A/10C of the GCU 2
. pins A/9D and A/10D of the GCU 2
. pins A/10C and A/10D of the GCU 2.
- repair or replace as necessary.
- replace the GCU-2 [1XU2] AMM 24-22-34-000-001 and AMM 24-22-34-400-001.
- replace the engine 2 IDG [4000XU] AMM 24-21-51-000-040 and AMM 24-21-51-400-040.
A. If the Class 3 Faults gives the maintenance message IDG2 (E2-4000XU) OIL IN TEMP/ GCU2 (1XU2):
Subtask 24-21-00-740-057-A ** ON A/C NOT FOR ALL - Do a check of the resistance of the oil inlet temperature-sensor of the IDG 2 between pins B/8 and B/9 (100 ohms plus or minus 10 ohms at the ambient temperature of the IDG case) ASM 242101.
- Replace IDG-ENG 2 [4000XU2] AMM 24-21-51-000-803 and AMM 24-21-51-400-803.
- 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 2 and pin A/9D of the GCU 2
. Pin B/9 of the IDG 2 and pin A/10C of the GCU 2
. Pins A/9D and A/10D of the GCU 2
. Pins A/10C and A/10D of the GCU 2.
- Repair or replace as necessary.
- Replace GCU-2 [1XU2] AMM 24-22-34-000-001 and AMM 24-22-34-400-001.
- Replace IDG-ENG 2 [4000XU2] AMM 24-21-51-000-803 and AMM 24-21-51-400-803.
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.