IDG Servicing - Filling of the IDG with Oil or Addition of Oil after a Level Check Check of the Oil Level and Oil-Filter Differential-Pressure Indicator (DPI) Visual Inspection of the IDG for Oil Leaks and Check of the Electrical Circuits Operational Test of the IDG Disconnect and Reconnect (Reset) Function - Engine in Operation 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 2 was set to OFF because of a true failure, the fault
____ R confirmation is not necessary.
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R 4. Fault Isolation
_______________
R A. If the fault symptom is identified by the CFDS message IDG2 (E2-4000XU) R LOW OIL PRESSURE and the upper ECAM-DU warning IDG 2 OIL LO PR:
R NOTE : This CFDS message can come into view with other CFDS messages. Do
____ R the trouble shooting for all CFDS messages related to the IDG 2.
R - do a check of the Differential Pressure Indicator (DPI) of the IDG 2
R (Ref. AMM TASK 24-21-00-210-046).
R (1) If the DPI is extended:
R - replace the engine 2 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 a check of the IDG 2 oil level (Ref. AMM TASK 24-21-00-210-046).
R (a) If the oil level is not correct:
R - do a visual inspection of the IDG 2, the external oil-circuit
R tubing and the fuel/oil heat exchanger for oil leaks (Ref. AMM
R TASK 24-21-00-210-047).
R 1_ If you find leaks:
R - repair or replace the components as necessary to remove the
R oil leaks.
R 2_ If you find no leaks:
R - add oil (Ref. AMM TASK 12-13-24-612-041)
R - connect the IDG 2 (if disconnected)
R - do a dynamic disconnect test of the IDG 2 (Ref. AMM TASK 24-R 21-00-720-041).
R a_ If the oil pressure is correct:
R - stop the trouble shooting.
R (3) If the fault continues:
R - do the BITE test of the GAPCU (Ref. AMM TASK 24-41-00-740-002).
R (a) If the BITE test gives the message TEST FAILED:
R - push the line key adjacent to the TEST FAILED message.
R 1_ If the maintenance message GCU2 (1XU2) comes into view:
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 (b) If the BITE test gives the message TEST PASSED:
R - do a check of the low-oil pressure wiring for a short to ground
R between pin C/A of the IDG 2 and pin A/4A of the GCU 2 (Ref.
R ASM 24-21/01).
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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 engine 2 IDG (4000XU) (Ref. AMM TASK 24-21-51-R 000-040) and (Ref. AMM TASK 24-21-51-400-040).
R a_ If the fault continues:
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 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).
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