DOC AIRBUS | AMM A320FVisual Inspection of the Integrated Drive Generator (IDG) for Oil Leakage Engine Static and Check of the Electrical Circuits
TASK 24-21-00-210-806-A-01
Visual Inspection of the Integrated Drive Generator (IDG) for Oil Leakage Engine Static and Check of the Electrical Circuits
To make sure that the IDG oil system is serviceable and to do a check for leakage, staining or wetting.
To make sure that the wiring harnesses are in correct condition.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 24-21-00-941-108-A ** ON A/C NOT FOR ALL
Subtask 24-21-00-210-117-A ** ON A/C NOT FOR ALL
Subtask 24-21-00-410-135-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:12:47 UTC
Visual Inspection of the Integrated Drive Generator (IDG) for Oil Leakage Engine Static and Check of the Electrical Circuits
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
WARNING:
WEAR GOGGLES, INSULATED GLOVES AND OTHER PROTECTIVE CLOTHES.
HOT OIL CAN BURN YOUR EYES AND SKIN.
IF OIL TOUCHES YOUR EYES OR SKIN, GET MEDICAL AID.
CAUTION:
DO NOT OPERATE THE IDG:
- IF IT CONTAINS TOO MUCH OIL
- IF IT DOES NOT CONTAIN ENOUGH OIL
CAUTION:
DO NOT USE SOLVENTS THAT CONTAIN CHLORINE TO CLEAN THE EQUIPMENT (PUMP, HOSES, TANK AND FUNNEL) USED TO FILL THE IDG WITH OIL.
CHLORINE CONTAMINATION OF THE OIL CAN CAUSE FAST DETERIORATION OF THE OIL AND WILL DECREASE THE LIFE OF THE IDG.
1. Reason for the JobTo make sure that the IDG oil system is serviceable and to do a check for leakage, staining or wetting.
To make sure that the wiring harnesses are in correct condition.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 1M(3 FT) |
| No specific | 1 | AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY |
| 753970A | 1 | CSD IDG SYSTEM LEAK TESTER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 453 | HOT SECTION |
| 463 | HOT SECTION |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR, 451AL | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR, 461AL | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-13-24-612-803-A | Integrated Drive Generator (IDG) Servicing - Filling of the IDG with Oil or Addition of Oil after a Level Check |
| TASK 24-21-42-000-802-A | Removal of the IDG Fuel/Oil Heat-Exchanger |
| TASK 24-21-42-000-803-A | Removal of the IDG Oil/Oil Heat-Exchanger |
| TASK 24-21-42-400-802-A | Installation of the IDG Fuel/Oil Heat-Exchanger |
| TASK 24-21-42-400-803-A | Installation of the IDG Oil/Oil Heat-Exchanger |
| TASK 24-21-51-000-803-A | Removal of the Integrated Drive Generator - IDG 1(2) |
| TASK 24-21-51-400-803-A | Installation of the Integrated Drive Generator - IDG 1(2) |
| TASK 71-00-00-860-833-A | Procedure to Prevent Engine Motoring |
| TASK 71-13-00-010-802-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-802-A | Closing of the Fan Cowl Doors |
| TASK 78-30-00-040-805-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-30-00-440-805-A | Reactivation of the Thrust Reverser System after Ground Maintenance |
| TASK 78-36-00-010-802-A | Opening of the Thrust Reverser Cowl-Doors |
| TASK 78-36-00-410-802-A | Closing of the Thrust Reverser Cowl-Doors |
Subtask 24-21-00-941-108-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 24-21-00-010-139-A ** ON A/C NOT FOR ALL (1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
B. Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR,
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
Subtask 24-21-00-040-070-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR,
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
C. Deactivation of the Thrust Reverser System for Ground Maintenance
Subtask 24-21-00-010-140-A ** ON A/C NOT FOR ALL WARNING:
YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805). D. Get Access
(1) Open the left thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.
4. Procedure(1) Open the left thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.
Subtask 24-21-00-210-117-A ** ON A/C NOT FOR ALL
A. Oil Leak Test
(1) On the 753970A CSD IDG SYSTEM LEAK TESTER, close the drain valve, refer to the GSE manufacturer's instructions.
(2) Set the shut-off valve to off and close the regulator valve to prevent pressure release to the IDG fitting.
(3) Remove the dust cap from the pressure fill valve-coupling.
(4) Connect one end of the pressure fill hose (1) of the 753970A CSD IDG SYSTEM LEAK TESTER to the pressure fill valve-coupling (pressure fill port) of the IDG, refer to the GSE manufacturer's instructions.
(5) Connect the other end of the 753970A CSD IDG SYSTEM LEAK TESTER to the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY, refer to the GSE manufacturer's instructions.
(6) Turn the shut-off valve to on and adjust the regulator valve to a pressure of 1.72 bar (24.9465 psi) on the system pressure gauge, refer to the GSE manufacturer's instructions.
(7) Turn the supply valve to off to keep the air in the system, refer to the GSE manufacturer's instructions.
(9) If there is(are) leak(s), do a visual inspection of these components:
1 The pressure fill port, replace the pressure fill valve-coupling (Ref. AMM TASK 24-21-51-000-803) and (Ref. AMM TASK 24-21-51-400-803).
2 The overfill drain port, replace the overfill drain valve-coupling (Ref. AMM TASK 24-21-51-000-803) and (Ref. AMM TASK 24-21-51-400-803).
3 The oil-inlet and oil-outlet ports or the case drain, replace the related fitting.
4 The vacuum break valve:
1 For tubes LS01 and LS04:
If necessary, fill the IDG oil tank (Ref. AMM TASK 12-13-24-612-803).
(11) If you cannot find the cause of the leak visually, do a check of the system for leaks. To do this, use soap suds or equivalent leak detector fluid:
Subtask 24-21-00-210-118-A ** ON A/C NOT FOR ALL (1) On the 753970A CSD IDG SYSTEM LEAK TESTER, close the drain valve, refer to the GSE manufacturer's instructions.
(2) Set the shut-off valve to off and close the regulator valve to prevent pressure release to the IDG fitting.
(3) Remove the dust cap from the pressure fill valve-coupling.
(4) Connect one end of the pressure fill hose (1) of the 753970A CSD IDG SYSTEM LEAK TESTER to the pressure fill valve-coupling (pressure fill port) of the IDG, refer to the GSE manufacturer's instructions.
(5) Connect the other end of the 753970A CSD IDG SYSTEM LEAK TESTER to the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY, refer to the GSE manufacturer's instructions.
(6) Turn the shut-off valve to on and adjust the regulator valve to a pressure of 1.72 bar (24.9465 psi) on the system pressure gauge, refer to the GSE manufacturer's instructions.
(7) Turn the supply valve to off to keep the air in the system, refer to the GSE manufacturer's instructions.
NOTE: When there is no leak in the IDG, the pressure in the system become stable. When there is a leak in the IDG:
(8) Monitor the system pressure for five minutes to make sure that there is(are) no leak(s). - The pressure will decrease to a lower value because of the vent valve position.
- The pressure will stay at this position.
(9) If there is(are) leak(s), do a visual inspection of these components:
NOTE: There can be different signs of possible leakage:
(a) IDG fittings for leakage: - Very small drops of oil
- Wet areas around the connections
- Oil stripes on the hoses
- Stains or discoloration which can occur when oil or grease touches very hot surfaces.
- The pressure fill port
- The overfill drain port
- The oil-inlet and oil-outlet ports (IDG oil tubes LS01 and LS04 connections between the IDG and the thermal management-system manifold)
- The case drain plug
- The vacuum break valve.
1 The pressure fill port, replace the pressure fill valve-coupling (Ref. AMM TASK 24-21-51-000-803) and (Ref. AMM TASK 24-21-51-400-803).
2 The overfill drain port, replace the overfill drain valve-coupling (Ref. AMM TASK 24-21-51-000-803) and (Ref. AMM TASK 24-21-51-400-803).
3 The oil-inlet and oil-outlet ports or the case drain, replace the related fitting.
4 The vacuum break valve:
- Remove the IDG (Ref. AMM TASK 24-21-51-000-803).
- Send the IDG to the workshop to replace the vacuum break valve.
- Install a serviceable IDG (Ref. AMM TASK 24-21-51-400-803).
1 For tubes LS01 and LS04:
- No cracks are permitted on the tubes and the B-nuts.
- Replace the broken or the cracked brackets.
- Replace the worn clamps.
- If missing, install the nuts and the bolts.
- Tighten the loose nuts and the bolts.
- The body of the IDG fuel/oil heat-exchanger.
If you find a leak, replace the IDG fuel/oil heat-exchanger (Ref. AMM TASK 24-21-42-000-802) and (Ref. AMM TASK 24-21-42-400-802).
- The body of the IDG oil/oil heat-exchanger.
If you find a leak, replace the IDG oil/oil heat-exchanger (Ref. AMM TASK 24-21-42-000-803) and (Ref. AMM TASK 24-21-42-400-803).
If necessary, fill the IDG oil tank (Ref. AMM TASK 12-13-24-612-803).
(11) If you cannot find the cause of the leak visually, do a check of the system for leaks. To do this, use soap suds or equivalent leak detector fluid:
- Put a container below the drain valve 753970A CSD IDG SYSTEM LEAK TESTER and open the valve to release the pressure, refer to the GSE manufacturer's instructions.
- Make the necessary corrections and put the system back to an operational configuration.
- Do the check again to make sure that you repaired the leak.
NOTE: If oil collects in the collecting filter, use the drain valve at the bottom of the filter housing to drain the oil, refer to the GSE manufacturer's instructions.
NOTE: If you use the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY, it is necessary to install a plug on the port for the compressed air source, refer to the GSE manufacturer's instructions.
B. Check of the Electrical Circuits
(1) Make sure that the wiring harnesses are in the correct condition.
(2) Make sure that the electrical connectors are correctly connected.
5. Close-up(1) Make sure that the wiring harnesses are in the correct condition.
(2) Make sure that the electrical connectors are correctly connected.
Subtask 24-21-00-410-135-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the left thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
Subtask 24-21-00-440-067-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the left thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
B. Reactivation of the Thrust Reverser System after Ground Maintenance
(1) Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 24-21-00-410-136-A ** ON A/C NOT FOR ALL (1) Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).