Servicing of the IDG after Oil Contamination and Extension of the Oil Filter Differential Pressure Indicator (DPI)

TASK 24-21-00-612-807-A-01
Servicing of the IDG after Oil Contamination and Extension of the Oil Filter Differential Pressure Indicator (DPI)

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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

CAUTION: DO NOT LET ENGINE OIL FALL ON THE ENGINE. UNWANTED OIL MUST BE REMOVED IMMEDIATELY. THE OIL CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

CAUTION: DO NOT OPERATE THE IDG:

IF IT CONTAINS TOO MUCH OIL
IF IT DOES NOT CONTAIN ENOUGH OIL

IF YOU DO, YOU CAN CAUSE DAMAGE TO THE IDG.

CAUTION: USE ONLY NEW CANS OF OIL WHEN YOU FILL THE IDG WITH OIL OR ADD OIL TO THE IDG. THE CONTAMINATION IN OIL THAT STAYS IN OPEN CANS CAN CAUSE FAST DETERIORATION OF THE OIL AND WILL DECREASE THE LIFE OF THE IDG.

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.

CAUTION: DO NOT DO THE SERVICING OF A DISCONNECTED IDG. CONTINUED OPERATION OF A DEFECTIVE IDG CAN CAUSE DAMAGE.

ZONE: 435
ZONE: 445

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

REFERENCE	QTY	DESIGNATION
No specific	1	CONTAINER 10 L(2 1/2 USGAL)
No specific	1	FILLING EQUIPMENT - TANK OIL
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 40 and 30 lbf.ft (5.42 and 4.07 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03ABA1)	Synthetic base Lubricating Oil-Turbine Engine - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
435	FAN AND ACCESSORY GEARBOX
445	FAN AND ACCESSORY GEARBOX
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-24-612-804-A	Integrated Drive Generator (IDG) Servicing - Filling of the IDG with Oil or Addition of Oil after a Level Check
TASK 24-21-51-000-806-A	Removal of the Integrated Drive Generator (IDG) - IDG 1(2)
TASK 24-21-51-000-810-A	Removal of the IDG Oil Charge and Scavenge Filter-Elements
TASK 24-21-51-400-806-A	Installation of the Integrated Drive Generator (IDG) - IDG 1(2)
TASK 24-21-51-400-810-A	Installation of the IDG Oil Charge and Scavenge Filter-Elements
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 73-11-50-000-802-A	Removal of the Integrated Drive Generator (IDG) Oil Cooler
TASK 73-11-50-400-802-A	Installation of the Integrated Drive Generator (IDG) Oil Cooler
Servicing of the IDG after Oil Contamination and Extension of the Oil-Filter Differential Pressure Indicator (DPI)

3. Job Set-up
Subtask 24-21-00-861-079-A

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 24-21-00-941-106-A

B. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 24-21-00-010-137-A

C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR

4. Procedure
Subtask 24-21-00-020-095-A

A. Removal of the IDG and the IDG Oil Cooler
(1) Remove the IDG (Ref. AMM TASK 24-21-51-000-806).
(2) If the cause of the contamination is a leak of the IDG oil cooler:
(a) Remove the IDG oil cooler (Ref. AMM TASK 73-11-50-000-802).

Subtask 24-21-00-420-099-A

B. Installation of the IDG and the IDG Oil Cooler
(1) Install a new IDG (Ref. AMM TASK 24-21-51-400-806).
(2) Do not connect the IDG oil-in hose from the IDG oil cooler to the IDG oil-in port at this time.
(3) If the cause of the contamination is a fuel leak of the IDG oil-cooler assembly:
(a) Install a new IDG oil cooler (Ref. AMM TASK 73-11-50-400-802).

Subtask 24-21-00-612-103-A

CAUTION: USE ONLY APPROVED TYPES/BRANDS OF LUBRICANTS. DO NOT MIX TYPES//BRANDS OF LUBRICANTS.

C. Flushing of the External Lines

NOTE: Approximately 3.8 l (1.00 USgal) of oil will flow into the CONTAINER 10 L(2 1/2 USGAL) (1).

(1) Put the end of the IDG oil-in hose in the CONTAINER 10 L(2 1/2 USGAL) (1).
(2) Remove the blanking cap from the pressure fill half-coupling.
(3) Connect the pressure fill hose (2) of the FILLING EQUIPMENT - TANK OIL to the pressure fill half-coupling.
(4) Use the FILLING EQUIPMENT - TANK OIL to fill the IDG with filtered Synthetic base Lubricating Oil-Turbine Engine - - (Material No.03ABA1) until:

The color of the oil that flows from the IDG oil-in hose is the same as the color of the oil that you put into the IDG, or
You collect 3.8 l (1.0038 USgal) of oil from the IDG oil-in hose.

Subtask 24-21-00-420-100-A

D. Connection of the IDG Oil-In Line

CAUTION: USE TWO WRENCHES TO HOLD THE FITTINGS WHEN YOU TORQUE THE OIL-IN AND OIL-OUT LINES. IF NOT YOU CAN TRANSMIT TOO MUCH TORQUE TO THE IDG FITTINGS AND CAUSE DAMAGE TO THE IDG BOSSES.

(1) Connect the IDG oil-in hose to the IDG oil-in port.
(a) Use two wrenches, one to hold and the other to TORQUE the IDG oil-in hose to between 40 and 30 lbf.ft (5.42 and 4.07 m.daN )

.
(2) Replace the IDG-oil scavenge filter-element (Ref. AMM TASK 24-21-51-000-810) and (Ref. AMM TASK 24-21-51-400-810).

Subtask 24-21-00-612-104-A

E. Fill the IDG with oil and do an IDG-oil level check (Ref. AMM TASK 12-13-24-612-804).

5. Close-up
Subtask 24-21-00-410-133-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

Subtask 24-21-00-862-079-A

B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.03.31 23:20:00 UTC