Removal of the Integrated Drive Generator (IDG) Cooling Oil-out Tubes and Hoses

TASK 24-21-49-000-004-A
Removal of the Integrated Drive Generator (IDG) Cooling Oil-out Tubes and Hoses

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: DO NOT LET ENGINE OIL STAY ON YOUR SKIN FOR A LONG TIME. FLUSH THE OIL FROM YOUR SKIN WITH WATER. THE OIL IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY.

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 LET ENGINE FUEL OR OIL FALL ON THE ENGINE. UNWANTED FUEL OR OIL MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

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

REFERENCE	QTY	DESIGNATION
No specific	2	CONTAINER 4 L (1 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	FILLING EQUIPMENT - TANK OIL
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
Tubes and Hoses - IDG Oil Cooling

3. Job Set-up
Subtask 24-21-49-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occured not less than 5 minutes before you do this procedure.
(2) On the panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine 1(2).
(3) On the 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) to tell persons not to power supply the FADEC system.

Subtask 24-21-49-865-053-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 4000XU (IDG) FOR FIN: 1000EM1 (ENGINE1)
122VU	ELEC/GCU/1	2XU1	T26
122VU	ELEC/IDG1/DISC	1XT	T24
FOR FIN: 4000XU (IDG) FOR FIN: 1000EM2 (ENGINE2)
122VU	ELEC/GCU/2	2XU2	T27
122VU	ELEC/IDG2/DISC	2XT	T25

Subtask 24-21-49-010-051-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 24-21-49-864-051-A ** ON A/C NOT FOR ALL

A. Depressurization of the IDG case

WARNING: YOU MUST PUT THE DRAIN HOSE INTO A CONTAINER BEFORE YOU CONNECT THE DRAIN HOSE TO THE OVERFLOW DRAIN HALF-COUPLING. MAKE SURE THAT THE DRAIN HOSE HANGS DOWN VERTICALLY AND THE END OF THE HOSE IS ABOVE THE OIL LEVEL IN THE CONTAINER. WHEN YOU CONNECT THE DRAIN HOSE TO THE IDG, YOU RELEASE THE OIL PRESSURE AND OIL WILL SPRAY FROM THE DRAIN HOSE.

(1) Put a CONTAINER 4 L (1 USGAL) in position under the IDG.
(2) Remove the dust cap from the overflow drain half-coupling.
(3) Connect the overflow drain hose of the FILLING EQUIPMENT - TANK OIL to the overflow drain half-coupling. Oil can come out of the overflow drain hose of the FILLING EQUIPMENT - TANK OIL from the overflow drain half-coupling.
(4) Disconnect the overflow drain hose of the FILLING EQUIPMENT - TANK OIL from the overflow drain half-coupling.
(5) Install the dust cap on the overflow drain half-coupling.

Subtask 24-21-49-020-053-A ** ON A/C NOT FOR ALL

B. Removal of the oil-out hose from the IDG

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(1) Put the CONTAINER 4 L (1 USGAL) below the hoses on the IDG to catch the oil when the hoses are disconnected.
(2) Disconnect the oil-out hose (50) from the IDG (60).

NOTE: Use a second wrench to hold the union on the IDG when you loosen the hose (50) coupling nut.

(3) Disconnect the oil-out hose (50) from the lower oil-out tube (40).

NOTE: Use a second wrench to hold the fitting on the tube (40) when you loosen the hose (50) coupling nut.

(4) Put COVER - PROTECTION on the union on the IDG and the two ends of the oil-out hose (50).
(5) Remove the oil-out hose (50) from the engine.

Subtask 24-21-49-020-054-A ** ON A/C NOT FOR ALL

C. Removal of the lower oil-out tube assembly

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(1) Remove the screws (15) that attach the clampshells (20) to the engine brackets at Sta. 158 (B1). (two locations).
(2) Remove the screw (15), washer (30), nut (35) that attach the clampshell (20) to the channel.
(3) Disconnect the lower oil-out tube (40) from the upper oil-out tube (5).

NOTE: Use a second wrench to hold the fitting on the tube (5) when you loosen the tube (40) coupling nut.

(4) Put COVER - PROTECTION on the two ends of the lower oil-out tube (40).
(5) Remove the lower oil-out tube (40) from the engine.

Subtask 24-21-49-020-055-A ** ON A/C NOT FOR ALL

D. Removal of the Upper Oil-out Tube-Assembly

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(1) Remove the screws (15) that attach the clampshell (20) to the channel.
(2) Loosen the coupling nut of the upper oil-out tube (5). When you do this, use a second wrench to hold the fitting on the oil-in port of the IDG oil cooler.
(3) Disconnect the upper oil-out tube (5) of the IDG from the oil-in port of the IDG oil cooler.
(4) Put the COVER - PROTECTION on the IDG oil-cooler fitting and on the two ends of the upper oil-out tube.
(5) Remove the upper oil-out tube (5) from the engine.

[Rev.10 from 2021] 2026.03.31 23:21:08 UTC