Removal of the MLG Lock Springs

TASK 32-11-19-000-001-A
Removal of the MLG Lock Springs

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.

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	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. 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 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-00-00-481-002-A	Installation of the Safety Devices on the Landing Gear Doors
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 32-11-19-081-001-A	Removal of the MLG Spring-Expander Tool
TASK 32-11-19-481-001-A	Installation of the MLG Spring-Expander Tool
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
MLG Locksprings

3. Job Set-up
Subtask 32-11-19-941-058-A

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On panel 400VU:

Make sure that the landing-gear control-lever 6GA is in the DOWN position
Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear or the Main gear doors.

(4) Put a WARNING NOTICE(S) in the cockpit to tell persons not to pressurize the Green hydraulic system.

Subtask 32-11-19-860-060-A

B. Aircraft Maintenance Configuration
(1) Disconnect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-001).

Subtask 32-11-19-869-051-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 32-11-19-865-050-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
121VU	LGCIU/BAT SPLY/SYS2	59GA	R33
121VU	LGCIU/BAT SPLY/SYS1	58GA	R32
** ON A/C ALL
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	LGCIU/BAT SPLY/SYS2	59GA	R32
121VU	LGCIU/BAT SPLY/SYS1	58GA	R31

Subtask 32-11-19-010-052-A

E. Get Access
(1) Open the applicable MLG door (Ref. AMM TASK 32-12-00-010-001).
(2) Install the GROUND LOCK SLEEVE on the applicable MLG door actuating cylinder (Ref. AMM TASK 32-00-00-481-002).
(3) Put the ACCESS PLATFORM 2M (6 FT) in position below the applicable zone 731(741).

4. Procedure
Subtask 32-11-19-020-051-A

A. Removal of the MLG Lock Springs

WARNING: BE CAREFUL WHEN YOU REMOVE THE LOCKSPRINGS AS THEY ARE IN TENSION.

(1) Install the 460005832 SPRING EXPANDER-MLG SIDE STAY, (Ref. AMM TASK 32-11-19-481-001).
(2) Remove the cotter pin (13), the nut (12) and the washer (11). Discard the nut (12) and the cotter pin (13).
(3) Adjust the 460005832 SPRING EXPANDER-MLG SIDE STAY with the driving nut (7) until the pin (2) is loose.

NOTE: If the spring expander tool is not correctly adjusted, it will not be possible to remove the pin (2) easily.

(4) Remove the pin (2), the washer (10), the spacer (3) and the washer (4).
(5) Release the spring tension with the driving nut (7).
(6) Remove the cotter pin (20), the nut (19) and the washer (18). Discard the nut (19) and the cotter pin (20).
(7) Remove the:

pin (15)
lock spring (8)
washers (17), (14) and (16)
lock spring (6).

(8) Remove the lock springs (6) and (8) together with the 460005832 SPRING EXPANDER-MLG SIDE STAY.
(9) If the lock springs are to be replaced:
(a) Remove the 460005832 SPRING EXPANDER-MLG SIDE STAY (Ref. AMM TASK 32-11-19-081-001).
(b) Remove the lock springs (6) and (8) from the lock spring guide block.

[Rev.10 from 2021] 2026.04.01 00:40:35 UTC