Removal of the Left Thrust-Reverser Cascades - ENG NO. 1 [PW11]

TASK 78-32-30-000-801-A
Removal of the Left Thrust-Reverser Cascades - ENG NO. 1

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.

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.

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

B. Work Zones and Access Panels

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

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 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-32-00-860-802-A	Manual Extension of the Thrust-Reverser Translating Sleeves
Left Thrust-Reverser Cascades - Engine No. 1

3. Job Set-up
Subtask 78-32-30-941-050-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 78-32-30-010-050-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
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 78-32-30-040-050-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 78-32-30-860-051-A ** ON A/C NOT FOR ALL

D. Extend the left 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 78-32-30-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Left Thrust-Reverser Cascades - Engine No. 1.
(1) Remove the eight bolts (1) and the eight washers (2) that attach the left upper cascade (3) to the torque box and cascade ring.
(2) Remove the left upper cascade (3) from the thrust reverser half.
(3) Remove the 22 bolts (1) and the 22 washers (2) that attach the left upper middle cascade (4) to the torque box and cascade ring.
(4) Remove the left upper middle cascade (4) from the thrust reverser half.
(5) Remove the 22 bolts (1) and the 22 washers (2) that attach the left lower middle cascade (5) to the torque box and cascade ring.
(6) Remove the left lower middle cascade (5) from the thrust reverser half.
(7) Remove the nine bolts (1) and the nine washers (2) that attach the left lower cascade (6) to the torque box and cascade ring.
(8) Remove the left lower cascade (6) from the thrust reverser half.

[Rev.10 from 2021] 2026.04.01 03:32:47 UTC