Removal of the Pressure Relief Door

TASK 54-53-11-000-001-A
Removal of the Pressure Relief Door

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: 470
ZONE: 480

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 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
470	ENGINE 1 AFT PYLON
480	ENGINE 2 AFT PYLON

C. Referenced Information

REFERENCE	DESIGNATION
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
Pressure Relief Door ** ON A/C NOT FOR ALL
Presure Relief Door ** ON A/C NOT FOR ALL
Presure Relief Door ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 54-53-11-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 54-53-11-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position :
(a) at the zone 470 for the left pylon.
(b) at the zone 480 for the right pylon.

Subtask 54-53-11-040-050-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 54-53-11-040-050-B ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-040-012).

4. Procedure
Subtask 54-53-11-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Pressure Relief Door

Pressure Relief Door ** ON A/C NOT FOR ALL

(1) Remove the eight screws (5) and washers (6).
(2) Remove the panel (9).
(3) Remove the nuts (8) and the screws (1).
(4) Remove the nuts (7), the screws (4) and the washers (3).
(5) Remove the pressure relief door (2).

Subtask 54-53-11-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the Pressure Relief Door

Presure Relief Door ** ON A/C NOT FOR ALL

(1) Remove the four screws (1) and washers (2).
(2) Remove the pressure relief door (3).

[Rev.10 from 2021] 2026.04.01 02:02:24 UTC