Removal of the Door Assembly - Main

TASK 32-12-11-000-001-A
Removal of the Door Assembly - Main

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

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.

CAUTION: DO NOT CAUSE DAMAGE TO THE SURFACES. THE COMPONENTS ARE MADE OF CARBONFIBER REINFORCED PLASTIC.

CAUTION: DO NOT MOVE THE ACTUATOR SUDDENLY. SUDDEN MOVEMENT CAN CAUSE DAMAGE AT THE FORK LUG OF THE ACTUATOR FITTING AT THE KEEL BEAM.

CAUTION: THIS PART IS A REMOVABLE STRUCTURAL COMPONENT (RSC), WHICH CAN BE MOVED BETWEEN AIRCRAFT. THUS IT CAN HAVE DIFFERENT OPERATION CONDITIONS AND A DIFFERENT LIFE RECORD (FLIGHT HOURS/FLIGHT CYCLES/CALENDAR) FROM THE AIRCRAFT IT IS INSTALLED ON OR REMOVED FROM. THE OPERATOR IS RESPONSIBLE FOR THE SPECIFIC TRACKING AND CONTINUED AIRWORTHINESS OF REMOVABLE STRUCTURAL COMPONENTS. INCORRECT MAINTENANCE OF THESE COMPONENTS CAN CAUSE A RISK FOR THE FLIGHT SAFETY.

ZONE: 734
ZONE: 744

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)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	SPATULA - PLASTIC
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
734	MAIN DOOR
744	MAIN DOOR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 32-00-00-860-001-A	Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01	Flight Configuration Precautions without Electrical Power
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-31-35-000-001-A	Removal of the MLG Door Actuating-Cylinder
Main Gear Doors

3. Job Set-up
Subtask 32-12-11-941-050-A

A. Safety Precautions
(1) Put the WARNING NOTICE(S) in the flight compartment to tell persons not to operate the landing gear doors.
(2) Put the WARNING NOTICE(S) in position to tell persons not to operate the hydraulic systems.
(3) Put the ACCESS PLATFORM 2M (6 FT) in position at zone 734 for the left hand main landing gear door and/or zone 744 for the right hand main landing gear door.

Subtask 32-12-11-860-052-A

B. Depressurize Hydraulic Systems
(1) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).

Subtask 32-12-11-860-058-A

C. Flight Configuration Precautions
(1) If the electrical power is not necessary for other maintenance tasks, de-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002). Then, it is not necessary to operate the LGCIU circuit breakers.
(2) If the electrical power is necessary, do the precautions for flight configuration (Ref. AMM TASK 32-00-00-860-001) before you open the LGCIU circuit breakers.

Subtask 32-12-11-865-050-A

D. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
** ON A/C NOT FOR ALL
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C ALL
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY	4GG	M36
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/CTL	3GG	M35
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/CTL	1GG	M34
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY	2GG	M33
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 32-12-11-010-050-A

E. Access
(1) Open the left hand and/or right hand main landing gear door (Ref. AMM TASK 32-12-00-010-001).

4. Procedure
Subtask 32-12-11-020-053-A

A. Disconnection of the Main Gear Door
(1) Use a SPATULA - PLASTIC to remove the unwanted beads of sealant from the bolts (13) and (18) and nuts (3) and (24).
(2) Remove and discard the cotter pins (2), (23) and (11) from the nuts (3), (24) and (10).
(3) Remove the nuts (10), the washers (9) and the screws (8), to disconnect the bonding leads (12).
(4) Disconnect the actuator (1) 2523GM (2522GM) from the main gear door (Ref. AMM TASK 32-31-35-000-001).

NOTE: You must not move the actuator (1) suddenly. Sudden movement can cause damage at the fork lug of the actuator fitting at the keel beam.

(5) Remove the nuts (3) and (24) and the washers (4) and (25) from the hinge bolts (13) and (18).

Subtask 32-12-11-020-050-C

B. Removal of the Main Gear Door
(1) Hold fully the main gear door.
(2) Remove the hinge bolts (13) and (18).
(3) If the washers (15) and (16) are installed, remove them.
(4) Remove the spacers (5) and (14) and the flexible bearing (6).
(5) Remove the main gear door and put it on a clean and dry surface.

[Rev.10 from 2021] 2026.04.01 00:41:14 UTC