General Visual Inspection (GVI) of the Thrust Reverser Cascades [PW11]

TASK 78-32-30-210-801-A
General Visual Inspection (GVI) of the Thrust Reverser Cascades

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

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

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 2M (6 FT) - ADJUSTABLE
No specific	1	FLASHLIGHT
No specific	1	MAGNIFYING GLASS POWER 05X

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
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 78-32-00-860-802-A	Manual Extension of the Thrust-Reverser Translating Sleeves
TASK 78-32-00-860-803-A	Manual Retraction of the Thrust-Reverser Translating Sleeves
TASK 78-32-30-000-801-A	Removal of the Left Thrust-Reverser Cascades - ENG NO. 1
TASK 78-32-30-000-802-A	Removal of the Left Thrust-Reverser Cascades - ENG NO. 2
TASK 78-32-30-400-801-A	Installation of the Left Thrust-Reverser Cascades - ENG NO. 1
TASK 78-32-30-400-802-A	Installation of the Left Thrust-Reverser Cascades - ENG NO. 2
TASK 78-32-60-000-801-A	Removal of the Right Thrust-Reverser Cascades - ENG NO. 1
TASK 78-32-60-000-802-A	Removal of the Right Thrust-Reverser Cascades - ENG NO. 2
TASK 78-32-60-400-801-A	Installation of the Right Thrust-Reverser Cascades - ENG NO. 1
TASK 78-32-60-400-802-A	Installation of the Right Thrust-Reverser Cascades - ENG NO. 2
Thrust Reverser Cascades
Thrust Reverser Cascade Vanes

3. Job Set-up
Subtask 78-32-30-941-052-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 78-32-30-010-054-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
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

Subtask 78-32-30-040-052-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for 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 maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 78-32-30-860-054-A ** ON A/C NOT FOR ALL

D. Manually extend the thrust reverser translating sleeves (Ref. AMM TASK 78-32-00-860-802).

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 78-32-30-210-050-A ** ON A/C NOT FOR ALL

A. GVI of the Thrust Reverser Cascades
(1) Do not discard a part until you are sure there are no repairs available. If you reject a part and no repair is available, contact United Technologies Aerospace Systems (UTAS) for disposition.
(2) Visually examine the thrust reverser cascades with a FLASHLIGHT and MAGNIFYING GLASS POWER 05X.
(a) Examine the bolts and washers that attach the cascade assemblies to the torque box and cascade ring. Look for loose or missing fasteners or other damage.
1 If you find damage or loose or missing fasteners, replace the damaged or missing parts or tighten the loose fasteners (Ref. AMM TASK 78-32-30-000-801), (Ref. AMM TASK 78-32-30-400-801), (Ref. AMM TASK 78-32-30-000-802), (Ref. AMM TASK 78-32-30-400-802), (Ref. AMM TASK 78-32-60-000-801), (Ref. AMM TASK 78-32-60-400-801), (Ref. AMM TASK 78-32-60-000-802) and (Ref. AMM TASK 78-32-60-400-802).
(b) Examine the cascade assembly. Look for cracks, corrosion, wear and delamination in the vanes or other damage.
1 If you find damage, refer to the Structural Repair Manual for allowable damage limits and repair procedures or contact UTAS for disposition.

5. Close-up
Subtask 78-32-30-860-055-A ** ON A/C NOT FOR ALL

A. Manually retract the thrust reverser translating sleeve (Ref. AMM TASK 78-32-00-860-803).

Subtask 78-32-30-440-051-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 78-32-30-410-051-A ** ON A/C NOT FOR ALL

C. 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 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:32:51 UTC