Installation of the Thrust-Reverser Cowl Fitting at RIB4

TASK 54-57-17-400-804-A
Installation of the Thrust-Reverser Cowl Fitting at RIB4

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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

ZONE: 410
ZONE: 420
FIN: 4020KM1 ** ON A/C NOT FOR ALL
FIN: 4020KM2 ** 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	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06LDG2)	Non Hardening Jointing Putty-High Temp. Area - Structure

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
415AL, 415BR, 425AL, 425BR
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 54-51-21-000-802-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-21-400-802-A	Installation of the Pylon Lateral Access-Doors
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
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
Thrust-Reverser Cowl Fitting at RIB4
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
TASK 78-32-01-400-802-A	Installation of the Left Thrust Reverser Half - Engine 1
TASK 78-32-02-400-802-A	Installation of the Right Thrust Reverser Half - Engine 1
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
TASK 78-32-01-400-803-A	Installation of the Left Thrust Reverser Half - Engine 2
TASK 78-32-02-400-803-A	Installation of the Right Thrust Reverser Half - Engine 2

3. Job Set-up
Subtask 54-57-17-941-062-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(2) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position:
(a) For the left pylon, in zone 415
(b) For the right pylon, in zone 425.
(3) Make sure that the pylon lateral access-doors are removed (Ref. AMM TASK 54-51-21-000-802):
(a) For the left pylon: 415AL 415BR
(b) For the right pylon: 425AL 425BR.

Subtask 54-57-17-040-056-A ** ON A/C NOT FOR ALL

B. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER IS LOCKED. IF NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE REVERSER.

(1) Make sure that the thrust reverser is unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-805).

4. Procedure
Subtask 54-57-17-420-061-A ** ON A/C NOT FOR ALL

A. Installation of the Thrust-Reverser Cowl Fitting at RIB4

Thrust-Reverser Cowl Fitting at RIB4 ** ON A/C NOT FOR ALL

(1) If you install new reverser fittings, do a dimensional check of the new and the initial reverser fittings.
(2) Obey the location and thickness of the peel shim recorded at the removal.
(3) Put the shim (4) in the correct position on the pylon.
(4) Put the thrust-reverser cowl fitting (1) in position.
(5) Install the washers (5) on the bolts (6).
(6) Apply Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) on the shanks of the bolts (6).
(7) Install the washers (3) and the nuts (2).
(8) Tighten the nuts (2).

5. Close-up
Subtask 54-57-17-410-061-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Install the pylon lateral access-doors (Ref. AMM TASK 54-51-21-400-802):
(a) For the left pylon: 415AL 415BR
(b) For the right pylon: 425AL 425BR.
(2) Install the thrust reversers:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL and 452AR (Ref. AMM TASK 78-32-01-400-802) and (Ref. AMM TASK 78-32-02-400-802)
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL and 462AR (Ref. AMM TASK 78-32-01-400-803) and (Ref. AMM TASK 78-32-02-400-803).

Subtask 54-57-17-440-055-A ** ON A/C NOT FOR ALL

B. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 54-57-17-942-052-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:03:48 UTC