Installation of the Pylon Lateral Access-Doors

TASK 54-51-21-400-001-A
Installation of the Pylon Lateral Access-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 2M (6 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )
No specific	Torque wrench: range to between 2.24 and 1.79 m.daN (16.52 and 13.20 lbf.ft )

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
415AL, 415AR, 415BL, 415BR, 425AL, 425AR, 425BL, 425BR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
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
Pylon Lateral Access-Doors ** ON A/C NOT FOR ALL
Pylon Lateral Access-Doors ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 54-51-21-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position:
(a) At zone 410 for the left pylon
(b) At zone 420 for the right pylon.
(3) Make sure that the WARNING NOTICE(S) is in position:
(a) On the center pedestal, on ENG panel 115VU
(b) On overhead maintenance panel 50VU.

Subtask 54-51-21-040-051-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 78-30-00-481-041).

Subtask 54-51-21-040-051-B ** 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 78-30-00-040-012).

Subtask 54-51-21-040-051-C ** 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 78-30-00-481-041).

Subtask 54-51-21-110-050-A ** ON A/C NOT FOR ALL

C. Preparation for the Installation
(1) Clean the component interfaces and the adjacent area.
(2) Do a visual inspection of the component interfaces and the adjacent area.

4. Procedure
Subtask 54-51-21-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Pylon Lateral Access-Doors

Pylon Lateral Access-Doors ** ON A/C NOT FOR ALL

(1) Install pylon lateral access-door 415BL:

NOTE: The procedure is the same for pylon lateral access-doors 415BR, 425BL and 425BR.

(a) Put the pylon lateral access-door (1) in position and install the washers (2) and the screws (3).
(b) TORQUE the screws (3) to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )

.
(2) Install pylon lateral access-door 415AL:

NOTE: The procedure is the same for pylon lateral access-doors 415AR, 425AL and 425AR.

(a) Put the pylon lateral access-door (5) in position and install the screws (4).
(b) TORQUE the screws (4) to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )

Subtask 54-51-21-420-050-B ** ON A/C NOT FOR ALL

A. Installation of the Pylon Lateral Access-Doors

Pylon Lateral Access-Doors ** ON A/C NOT FOR ALL

(1) Install pylon lateral access-door 415BL:

NOTE: The procedure is the same for pylon lateral access-doors 415BR, 425BL and 425BR.

(a) Install the washer (4) and the captive screw (6) on the pylon lateral access-door (3).
(b) TORQUE the captive screw (6) to between 2.24 and 1.79 m.daN (16.52 and 13.20 lbf.ft )

.
(c) Install the spring pin (5).
(d) Put the pylon lateral access-door (3) in position and install the washers (2) and the screws (1).
(e) TORQUE the screws (1) to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )

.
(2) Install pylon lateral access-door 415AL:

NOTE: The procedure is the same for pylon lateral access-doors 415AR, 425AL and 425AR.

(a) Put the pylon lateral access-door (8) in position and install the screws (7).
(b) TORQUE the screws (7) to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )

5. Close-up
Subtask 54-51-21-440-050-A ** ON A/C NOT FOR ALL

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

Subtask 54-51-21-440-050-B ** ON A/C NOT FOR ALL

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

Subtask 54-51-21-440-050-C ** ON A/C NOT FOR ALL

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

Subtask 54-51-21-862-050-A ** ON A/C NOT FOR ALL

B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

Subtask 54-51-21-410-050-A ** ON A/C NOT FOR ALL

C. Close Access
(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 02:01:03 UTC