Removal of the Quick Attach/Detach (QAD) Adapter of the IDG

TASK 24-21-41-000-802-A
Removal of the Quick Attach/Detach (QAD) Adapter of the IDG

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

ZONE: 453
ZONE: 463
FIN: 4000XU ** ON A/C NOT FOR ALL
FIN: 4000XU1 ** ON A/C NOT FOR ALL
FIN: 4000XU2 ** ON A/C NOT FOR ALL

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	ACCESS PLATFORM 1M(3 FT)
No specific	AR	COVER - PROTECTION
No specific	1	MALLET - SOFT FACE
No specific	1	PUNCH - FLAT-END
No specific	1	PUNCH - POINTED
No specific	1	SCREWDRIVER - FLAT HEAD

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
453	HOT SECTION
463	HOT SECTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-21-51-000-803-A	Removal 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 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
IDG Quick Attach/Detach (QAD) Adapter

3. Job Set-up
Subtask 24-21-41-941-059-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 24-21-41-010-073-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 24-21-41-040-050-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser System for Ground Maintenance

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).

Subtask 24-21-41-010-074-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.

4. Procedure
Subtask 24-21-41-020-058-A ** ON A/C NOT FOR ALL

A. Removal of the IDG
(1) Remove the IDG 1(2) (Ref. AMM TASK 24-21-51-000-803).

Subtask 24-21-41-020-059-A ** ON A/C NOT FOR ALL

B. Removal of the Quick Attach/Detach (QAD) adapter
(1) Remove the QAD adapter (2) from the accessory-gearbox mounting pad (1):
(a) Hit the head of each flat head screw (3) with a PUNCH - FLAT-END (5).

NOTE: The flat head screws (3) rub or get caught in mating parts. You must use force to loosen the flat head screws (3).

CAUTION: YOU CAN DAMAGE THE SCREWS IF YOU USE TOO MUCH FORCE TO HIT THE PUNCH.

(b) If you cannot loosen the flat head screws (3):

Put the PUNCH - POINTED (7) on the flat head screws (3) in an angular position which will make the screw turn counterclockwise.
Hit the screw (3).

NOTE: An impact SCREWDRIVER - FLAT HEAD can be used as an alternative to the PUNCH - POINTED (7).

(2) Remove the flat head screws (3) that attach the QAD adapter (2) to the accessory-gearbox mounting pad (1).
(3) Pull the QAD adapter (2) away from the accessory-gearbox mounting pad (1).

NOTE: If you cannot easily release the QAD adapter (2) from the accessory-gearbox mounting pad (1), lightly hit the QAD adapter (2) with a MALLET - SOFT FACE (4).

(4) Discard the gasket (6) only if it is damaged or shows signs of too much wear.
(5) Install the COVER - PROTECTION on the accessory-gearbox mounting-pad (1).

[Rev.10 from 2021] 2026.03.31 23:20:41 UTC