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

TASK 24-21-41-000-803-A
Removal of the Quick-Attach-Detach (QAD) Adapter of the IDG

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

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	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
No specific	AR	WARNING NOTICE(S)

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-21-51-000-806-A	Removal of the Integrated Drive Generator (IDG) - IDG 1(2)
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
Quick-Attach-Detach (QAD) Adapter of the IDG

3. Job Set-up
Subtask 24-21-41-941-062-A

A. 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 WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 24-21-41-010-080-A

B. 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 24-21-41-020-060-A

A. Remove the Integrated Drive Generator (IDG) (Ref. AMM TASK 24-21-51-000-806).

Subtask 24-21-41-020-061-A

B. Removal of the Quick-Attach-Detach (QAD) Adapter
(1) To remove the QAD adapter (2) from the accessory gearbox mounting-pad (1):
(a) Hit the head of each of the flat head screws (3) with a PUNCH - FLAT-END (6).

NOTE: The flat head screws (3) can rub or get caught in the 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:

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

NOTE: You can use an impact SCREWDRIVER - FLAT HEAD 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 (5).

(4) Discard the gasket (4) 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 23:20:43 UTC