Removal of the Visor Assembly

TASK 54-52-12-000-801-A
Removal of the Visor Assembly

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: 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.

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. 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
411AL, 421AL
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 54-52-11-000-805-A	Removal of the Access Skin Panels
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
Visor Assembly

3. Job Set-up
Subtask 54-52-12-941-052-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 54-52-12-040-054-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 the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 54-52-12-010-054-A ** ON A/C NOT FOR ALL

C. 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) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, in zone 410
(b) For the right pylon, in zone 420.
(3) Remove the access skin panel (Ref. AMM TASK 54-52-11-000-805):
(a) For the left pylon: 411AL
(b) For the right pylon: 421AL.

4. Procedure
Subtask 54-52-12-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Visor Assembly

Visor Assembly ** ON A/C NOT FOR ALL

(1) Remove the screws (8) and the washers (9).
(2) Disconnect the bonding straps (10).
(3) Hold the visor assembly (1).
(4) Remove the nuts (6) and (7) and the washers (5) and (4).
(5) Remove the bolts (3) and (2).
(6) Remove the visor assembly (1).

[Rev.10 from 2021] 2026.04.01 02:02:05 UTC