Visual Inspection of the IDG for Oil Leaks and Check of the Electrical Circuits

TASK 24-21-00-210-047-A
Visual Inspection of the IDG for Oil Leaks 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.

1. Reason for the Job
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 the correct condition.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
438AR
FOR [1000EM2] (ENGINE-2)
448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-24-612-041-A	Integrated Drive Generator (IDG) Servicing - Filling of the IDG with Oil or Addition of Oil after a Level Check
TASK 12-13-24-612-041-B	Integrated Drive Generator (IDG) Servicing - Filling of the IDG with Oil or Addition of Oil after a level Check
TASK 24-21-51-000-040-A	Removal of the Integrated Drive Generator - IDG 1(2)
TASK 24-21-51-000-040-B	Removal of the Integrated Drive Generator - IDG 1(2)
TASK 24-21-51-400-040-A	Installation of the Integrated Drive Generator - IDG 1(2)
TASK 24-21-51-400-040-E	Installation of the Integrated Drive Generator (IDG) 1(2) (New EPGS)
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 73-11-60-000-001-A	Removal of the Integrated Drive Generator (IDG) Oil Cooler Assembly
TASK 73-11-60-000-002-A	Removal of the Integrated Drive Generator (IDG) Oil Cooler Assembly
TASK 73-11-60-400-001-A	Installation of the Integrated Drive Generator (IDG) Oil Cooler Assembly
TASK 73-11-60-400-002-A	Installation of the Integrated Drive Generator (IDG) Oil Cooler Assembly

3. Job Set-up
Subtask 24-21-00-941-060-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).

Subtask 24-21-00-010-066-A ** ON A/C NOT FOR ALL

B. Open the right fan-cowl door (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
438AR
(2) FOR [1000EM2] (ENGINE-2)
448AR

4. Procedure
Subtask 24-21-00-210-059-A ** ON A/C NOT FOR ALL

A. Visual Inspection
(1) Do a visual inspection of these components:

NOTE: There can be different signs of possible leakage:

Droplets of oil
Wet areas around connections, oil stripes on tubes
Stains or discoloration which can occur when oil or grease is in contact with very hot surfaces.

(a) IDG fittings for leakage:

Pressure fill port
Overflow drain port
Oil-in and oil-out ports (cooling circuit interface with the IDG)
Case drain.

If you find an oil leak at:

The pressure fill port, replace the pressure fill half-coulping (Ref. AMM TASK 24-21-51-000-040) and (Ref. AMM TASK 24-21-51-400-040).
The overflow drain port, replace the overflow drain half-coupling (Ref. AMM TASK 24-21-51-000-040) and (Ref. AMM TASK 24-21-51-400-040) or (Ref. AMM TASK 24-21-51-400-040).
The oil-in and oil-out ports (cooling circuit interface with the IDG) or case drain, replace the related fitting.

(b) External oil circuit (oil lines) for leakage and correct condition:
1 Tubing

No cracks are permitted on tubes, hoses and tube coupling nuts.
There is no limit for the number of nicks and scratches if the depth is not more than 0.25 mm (0.0098 in.) (after removal of the high metal).
Two dents for each tube are permitted if they are of a smooth contour up to 1.27 mm (0.0500 in.) depth.
You must replace all tubes or hoses that are not in these limits.

2 Attachment

Replace broken or cracked brackets.
Replace worn clamps.
Install missing nuts and bolts.
Tighten loose nuts and bolts.

Oil-in and oil-out ports (cooling circuit interface with the cooler)
Drain plug
Body of the cooler.

If you find a leak, replace the IDG oil cooler (Ref. AMM TASK 73-11-60-000-001) and (Ref. AMM TASK 73-11-60-400-001).
(2) If you find components wet with oil, make sure that you find and correct all the causes.
If necessary, fill the oil tank (Ref. AMM TASK 12-13-24-612-041).

Subtask 24-21-00-210-059-B ** ON A/C NOT FOR ALL

A. Visual Inspection
(1) Do a visual inspection of these components:

NOTE: There can be different signs of possible leakage:

Droplets of oil
Wet areas around connections, oil stripes on tubes
Stains or discoloration which can occur when oil or grease is in contact with very hot surfaces.

(a) IDG fittings for leakage:

Pressure fill port
Overflow drain port
Oil-in and oil-out ports (cooling circuit interface with the IDG)
Case drain.
If you find an oil leak at:
The pressure fill port, replace the pressure fill half-coupling (Ref. AMM TASK 24-21-51-000-040) and (Ref. AMM TASK 24-21-51-400-040).
The overflow drain port, replace the overflow drain half-coupling (Ref. AMM TASK 24-21-51-000-040) and (Ref. AMM TASK 24-21-51-400-040).
The oil-in and oil-out ports (cooling circuit interface with IDG) or case drain, replace the related fitting.

(b) External oil circuit (oil lines) for leakage and correct condition:
1 Tubing

No cracks are permitted on tubes, hoses and tube coupling nuts.
There is no limit for the number of nicks and scratches if the depth is not more than 0.25 mm (0.0098 in.) (after removal of the high metal).
Two dents for each tube are permitted if they are of a smooth contour up to 1.27 mm (0.0500 in.) depth.
You must replace all tubes or hoses that are not in these limits.

2 Attachment

Replace broken or cracked brackets.
Replace worn clamps.
Install missing nuts and bolts.
Tighten loose nuts and bolts.

Oil-in and oil-out ports (cooling circuit interface with the cooler)
Drain plug
Body of the cooler.
If you find a leak, replace the IDG oil cooler (Ref. AMM TASK 73-11-60-000-002) and (Ref. AMM TASK 73-11-60-400-002).

(2) If you find components wet with oil, make sure that you find and correct all the causes.
If necessary, fill the oil tank (Ref. AMM TASK 12-13-24-612-041).

Subtask 24-21-00-210-060-A ** ON A/C NOT FOR ALL

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
Subtask 24-21-00-410-066-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the right fan cowl door (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
438AR
(b) FOR [1000EM2] (ENGINE-2)
448AR
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.03.31 23:20:16 UTC