Installation of the Forward Apron Assembly

TASK 54-57-22-400-822-A
Installation of the Forward Apron Assembly

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

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
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

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
413AL, 413AR, 423AL, 423AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 54-52-11-000-002-A	Removal of the Access Panels
TASK 54-52-11-000-002-B	Removal of the Access Panels
TASK 54-52-11-400-002-A	Installation of the Access Panels
TASK 54-52-11-400-002-B	Installation of the Access Panels
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 71-51-43-400-001-A	Installation of the Left Side Harness
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 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
Forward Apron Assembly

3. Job Set-up
Subtask 54-57-22-941-105-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that a WARNING NOTICE(S) is in position to tell persons not to start engine 1(2).
(2) On overhead maintenance panel 50VU:
(a) Make sure that the ENG/FADEC GND PWR/1(2) pushbutton switch is released (the ON legend is off).
(b) Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 54-57-22-040-095-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 reversers are unserviceable for maintenance (Ref. AMM TASK 78-30-00-481-041).

Subtask 54-57-22-010-094-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040).
(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 access panels are removed (Ref. AMM TASK 54-52-11-000-002)
(a) For the left pylon : 413AL and 413AR.
(b) For the right pylon : 423AL and 423AR.

Subtask 54-57-22-110-067-A ** ON A/C NOT FOR ALL

D. Preparation for Installation
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) If the parts retained from the removed component are not sufficiently clean, clean them with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(3) Do an inspection of the component interfaces and the adjacent area.

4. Procedure
Subtask 54-57-22-420-084-A ** ON A/C NOT FOR ALL

A. Installation of the Forward Apron Assembly
(1) Install the forward apron assembly (1).
(2) Install and tighten the bolts (8) and the washers (9).
(3) Install and tighten the bolts (8) and the nuts (7).
(4) Install and tighten the screws (6) and the nuts (7).
(5) Install and tighten the screws (5).

5. Close-up
Subtask 54-57-22-410-083-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 the plate (3) and tighten the bolts (2).
(3) Install the clamps (4).
(4) Connect the electrical connectors (Ref. AMM TASK 71-51-43-400-001).
(5) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040).
(6) Install the access panels (Ref. AMM TASK 54-52-11-400-002).
(a) For the left pylon : 413AL and 413AR.
(b) For the right pylon : 423AL and 423AR.
(7) Remove the access platform(s).
(8) Remove the WARNING NOTICE(S).

Subtask 54-57-22-440-076-A ** ON A/C NOT FOR ALL

B. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-081-041).

[Rev.10 from 2021] 2026.04.01 02:04:05 UTC