Installation of the Pressure Relief Doors

TASK 54-52-11-400-001-A
Installation of the Pressure Relief Doors

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

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 4M (13 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
413DT, 423DT
413DL, 423DL

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
9	COTTER PINS	AIPC 54-52-11-02-060

D. Referenced Information

REFERENCE	DESIGNATION
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after 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
Top Arch of the Pressure Relief Doors ** ON A/C NOT FOR ALL
Top Arch of the Pressure Relief Doors ** ON A/C NOT FOR ALL
Top Arch of the Pressure Relief Doors ** ON A/C NOT FOR ALL
Pressure Relief Doors ** ON A/C NOT FOR ALL
Pressure Relief Doors ** ON A/C NOT FOR ALL
Pressure Relief Doors ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 54-52-11-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position.
(2) Make sure that the warning notice(s) is in position.
(3) Make sure that the thrust reversers are unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 54-52-11-860-050-B ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the access platform is in position.
(2) Make sure that the warning notice(s) is in position.
(3) Make sure that the thrust reversers are unserviceable (Ref. AMM TASK 78-30-00-040-012).

4. Procedure
Subtask 54-52-11-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Arch Assembly

Top Arch of the Pressure Relief Doors ** ON A/C NOT FOR ALL

(1) Put the arch assembly (39) in position.
(2) Install the spacers (32), the bolts (31) and the nuts (33).
(3) Install the spacer (38), the washer (36), the bolt (35) and the nut (37). Tighten the nut.
(4) Install the screw (34) and tighten it.

Subtask 54-52-11-420-051-A ** ON A/C NOT FOR ALL

B. Installation of the Pressure Relief Doors

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

(1) Install the pressure relief doors (1) and (2).
(2) Install the shims (20) and (19).
(3) Install the washers (18) and (16), the bolt (17) and the nut (21). Tighten the nut.
(4) Install the shims (4), (3), (15) and (14).
(5) Install the washer (13), the bolt (12), the nut (5). Tighten the nut.
(6) Install the shims (8) and (7), the pin (10) and the washers (6).
(7) Install the AIPC 54-52-11-02-060 COTTER PINS (9) and safety them.
(8) Install the spring (11).

Subtask 54-52-11-210-051-A ** ON A/C NOT FOR ALL

C. Test
(1) Open and close the pressure relief doors to make sure that they are assembled correctly.

5. Close-up
Subtask 54-52-11-410-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install these access doors:
(a) For the left pylon: 413DL.
(b) For the right pylon: 423DL.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).

Subtask 54-52-11-410-050-B ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install these access doors:
(a) For the left pylon: 413DT.
(b) For the right pylon: 423DT.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).

Subtask 54-52-11-040-052-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 54-52-11-040-052-B ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-440-012).

[Rev.10 from 2021] 2026.04.01 02:01:51 UTC