Removal of the MLG Lock Stay

TASK 32-11-17-000-001-A
Removal of the MLG Lock Stay

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: 731
ZONE: 741

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	CAP - BLANKING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	TRESTLE - PADDED
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
731	L.H MAIN GEAR
741	R.H MAIN GEAR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 07-11-00-581-001-A	Lifting for Aircraft Maintenance Operations
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 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
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 32-00-00-860-001-A	Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01	Flight Configuration Precautions without Electrical Power
TASK 32-11-19-000-003-A	Disconnection of one end of the MLG Lock Springs from a MLG Side-Stay
TASK 32-31-73-000-001-A	Removal of the MLG Proximity-Sensors
MLG Lock Stay - Location and Detail ** ON A/C NOT FOR ALL
MLG Lock Stay - Location and Detail ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 32-11-17-941-051-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 installed 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.

(4) Put a WARNING NOTICE(S) on the ground service connections to tell persons not to pressurize the Green and Yellow hydraulic systems.

Subtask 32-11-17-860-053-A

B. Aircraft Maintenance Configuration
(1) Disconnect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-001).
(2) Make sure that the Yellow and Green hydraulic systems are depressurized (Ref. AMM TASK 29-00-00-864-001).

Subtask 32-11-17-582-050-A

C. Lift the Aircraft
(1) Lift the aircraft on jacks (Ref. AMM TASK 07-11-00-581-001).

Subtask 32-11-17-869-052-A

D. 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 32-11-17-865-050-A

E. 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 32-11-17-010-052-A

F. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) in position below the applicable MLG lockstay, at zone 731 or 741.

4. Procedure
Subtask 32-11-17-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the MLG Lock Stay

CAUTION: SAFETY THE SIDE-STAY TO PREVENT ITS MOVEMENT WHEN YOU REMOVE THE LOCK-STAY. THE SIDE-STAY WEIGHS 54.8kg (120.8lb).

(1) Disconnect the lock springs at the top attachments (Ref. AMM TASK 32-11-19-000-003).
(2) Disconnect the connector of the electrical cable (9) from the proximity sensor (7) and remove:

the bolts (13), the washers (12) and the clips (11).
Move the electrical cable (9) away from the bracket (8) and safety in this position.

(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(4) Remove the cotter pin (36), the nut (35) and the washer (34). Discard the cotter pin (36).
(5) Remove the pin (33) and the washer (32). Move the lock-stay actuating-cylinder eye-end away from the lock stay and remove the washers (37).
(6) Move the lock-stay actuating-cylinder away from the lock stay and safety in this position.
(7) Remove the cotter pin (44), the nut (45) and the washer (43). Discard the cotter pin (44).
(8) Remove the pin (41) and the washers (42).
(9) Remove the cotter pin (46), the nut (47) and the washer (48). Discard the cotter pin (46).
(10) Remove the pin (40) and the washer (39).
(11) Move the lock stay away from the side stay and remove the washers (38).
(12) Remove the cotter pin (21), the nut (20) and the washer (19). Discard the cotter pin (21).
(13) Hold the lock stay (18), which weighs 3.4 kg (7.5 lb) and remove the pin (16) and the washer (17).
(14) Carefully disengage the lock stay (18) from the cardan joint and collect the spacers (1). Put the lock stay on a TRESTLE - PADDED.
(15) If the lock stay is to be replaced, remove these parts:

the nut (31), the washer (30) and the bolt (29)
the nut (25), the washer (26) and the bolt (28)
the proximity-sensor bracket (27)
the proximity sensor (7) (Ref. AMM TASK 32-31-73-000-001).

(a) Hold the target bracket (4) and remove the nuts (3) and the washers (2).
(b) Remove the target bracket (4).
(c) Remove these parts:

the nuts (6) and the washers (5)
the bolts (10), (14) and (15)
the bracket (8).

Subtask 32-11-17-020-050-C ** ON A/C NOT FOR ALL

A. Removal of the MLG Lock Stay

CAUTION: SAFETY THE SIDE-STAY TO PREVENT ITS MOVEMENT WHEN YOU REMOVE THE LOCK-STAY. THE SIDE-STAY WEIGHS 54.8kg (120.8lb).

(1) Disconnect the lock springs at the top attachments (Ref. AMM TASK 32-11-19-000-003).
(2) Disconnect the connector of the electrical cable (9) from the proximity sensor (7) and remove:

The bolts (13), the washers (12) and the clips (11).

(3) Move the electrical cable (9) away from the bracket (8) and safety in this position.
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(5) Remove and discard the cotter pin (36) and the nut (35).
(6) Remove the washer (34).
(7) Remove the pin (33) and the washer (32). Move the lockstay actuating-cylinder eye-end away from the lockstay and remove the washers (37).
(8) Move the lockstay actuating-cylinder away from the lockstay and safety in this position.
(9) Remove and discard the cotter pin (44) and the nut (45).
(10) Remove the washer (43).
(11) Remove the pin (41) and the washers (42).
(12) Remove and discard the cotter pin (46) and the nut (47).
(13) Remove the washer (48).
(14) Remove the pin (40) and the washer (39).
(15) Move the lockstay away from the side-stay and remove the washers (38).
(16) Remove and discard the cotter pin (21) and the nut (20).
(17) Remove the washer (19).
(18) Hold the lockstay (18), which weighs 3.4 kg (7.5 lb) and remove the pin (16) and the washer (17).
(19) Carefully disengage the lock stay (18) from the cardan joint and collect the spacers (1). Put the lock stay on a TRESTLE - PADDED.
(20) If you have to remove the lockstay:
(a) Remove the items that follow:

The nut (31), the washer (30) and the bolt (29)
The nut (25), the washer (26) and the bolt (28)
The proximity-sensor bracket (27)
The proximity sensor (7) (Ref. AMM TASK 32-31-73-000-001).

(b) Discard the nuts (31) and (25).
(c) Hold the target bracket (4) and remove the nuts (3) and the washers (2). Discard the nuts (3).
(d) Remove the target bracket (4).
(e) Remove and discard the nut (6).
(f) Remove the items that follow:

The washer (5)
The bolts (10), (14) and (15)
The bracket (8).

[Rev.10 from 2021] 2026.04.01 00:40:26 UTC