Check Torque of IDG QAD Tension-Bolt

TASK 24-21-41-200-802-A
Check Torque of IDG QAD Tension-Bolt

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

1. Reason for the Job
Refer to the MPD TASK: 242100-17
CHECK TORQUE OF IDG QAD TENSION BOLT.
To do a torque check of the Integrated Drive Generator (IDG) Quick Attach/Detach (QAD) adapter tension-bolt without component removal.
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	1	CALIPER
No specific	1	DRIFT - BRASS
No specific	Torque wrench: range to between 26 and 22 lbf.ft (3.53 and 2.98 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P03-001)	lubricant, aircraft turbine engine
(Material No.P05-289)	Lockwire
(Material No.P05-291)	Safety Cable
(Material No.P05-292)	Safety Cable Ferrule
(Material No.12ABE2)	Corrosion Preventive Compound-Water Displacing Oily Film System

C. 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
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-21-41-000-802-A	Removal of the Quick Attach/Detach (QAD) Adapter of the IDG
TASK 24-21-41-400-802-A	Installation of the Quick Attach/Detach (QAD) Adapter of the IDG
TASK 24-21-51-000-803-A	Removal of the Integrated Drive Generator - IDG 1(2)
TASK 24-21-51-400-803-A	Installation of the Integrated Drive Generator - IDG 1(2)
TASK 70-24-00-910-811-A	Assembly - PWA 316 - Safety Wire (Lockwire) Installation
TASK 70-24-00-910-813-A	Assembly - PWA 316 - Safety Cable Installation
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 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Torque Check of the Tension Bolt of the IDG QAD Adapter

3. Job Set-up
Subtask 24-21-41-941-060-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 24-21-41-010-077-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 24-21-41-040-052-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 24-21-41-010-078-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 24-21-41-220-055-A ** ON A/C NOT FOR ALL

A. Torque Check of the QAD Adapter Tension-Bolt

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(1) Cut and discard the lockwire from the QAD adapter tension-bolt (2).
(2) Spray Corrosion Preventive Compound-Water Displacing Oily Film System (Material No.12ABE2) on:

The QAD ring (1)
The mating surface between the QAD adapter and the QAD ring (1), where you have access.

(3) Lubricate the QAD adapter tension-bolt (2) with P03-001lubricant, aircraft turbine engine.
(4) Measure the torque value of the QAD adapter tension-bolt (2).
(5) If the torque value of the QAD adapter tension-bolt (2) is less than 22 lbf.ft (2.98 m.daN), TORQUE the QAD adapter tension-bolt (2) to between 26 and 22 lbf.ft (3.53 and 2.98 m.daN )

.
(6) Tap the edge of the QAD ring (1) that you can see with the DRIFT - BRASS to make sure that the torque value you measure is correct.
(7) Do steps (3) and (4) again until the torque value does not decrease by more than 2 lbf.ft (0.27 m.daN).
(8) TORQUE the QAD adapter tension-bolt (2) to between 26 and 22 lbf.ft (3.53 and 2.98 m.daN )

.
(9) Lightly shake the anti-drive end of the IDG to make sure that the QAD adapter is correctly connected.
(a) If the IDG is loose:

Remove the IDG (Ref. AMM TASK 24-21-51-000-803).
Send the IDG to the workshop to replace the mounting flange.
Install the IDG (Ref. AMM TASK 24-21-51-400-803).
Replace the QAD adapter (Ref. AMM TASK 24-21-41-000-802) and (Ref. AMM TASK 24-21-41-400-802).

(b) If the IDG is not loose, continue this procedure.
(10) Do steps (4) and (5) again until the torque value does not decrease by more than 2 lbf.ft (0.27 m.daN).
(11) Do a check of the distance between the ring lug and the bracket of the QAD ring (1):
(12) Measure the distance between the ring lug and the bracket of the QAD ring (1) with the CALIPER.
(a) If the distance is less than 0.125 in. (3.17 mm):
1 Replace the IDG but keep the IDG accessory hoist installed and do not attach tubes, harnesses and other components (Ref. AMM TASK 24-21-51-000-803) and (Ref. AMM TASK 24-21-51-400-803).
2 Measure the distance again:
a If the distance is correct:

Safety the QAD adapter tension-bolt (2) with the Lockwire (Material No.P05-289) or the Safety Cable (Material No.P05-291) and the Safety Cable Ferrule (Material No.P05-292) and remove the IDG accessory hoist, the IDG attached components, the tubes and the harnesses (Ref. AMM TASK 70-24-00-910-813) or (Ref. AMM TASK 70-24-00-910-811).

Send the worn IDG that you removed to the workshop. After you do this, it is mandatory to replace the input flange.

b If the distance is not correct:

Remove the new IDG (Ref. AMM TASK 24-21-51-000-803).

Replace the QAD adapter (Ref. AMM TASK 24-21-41-000-802) and (Ref. AMM TASK 24-21-41-400-802).

(b) If the distance is more than 0.125 in. (3.17 mm):
1 Safety the QAD adapter tension-bolt (2) with the Lockwire (Material No.P05-289) or the Safety Cable (Material No.P05-291) and the Safety Cable Ferrule (Material No.P05-292) (Ref. AMM TASK 70-24-00-910-813) and (Ref. AMM TASK 70-24-00-910-811).

5. Close-up
Subtask 24-21-41-410-073-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the left thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL

Subtask 24-21-41-440-052-A ** ON A/C NOT FOR ALL

B. Reactivation of the Thrust Reverser System after Ground Maintenance
(1) Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 24-21-41-410-074-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.03.31 23:20:45 UTC