Removal of the MLG Uplock Pin

TASK 32-11-11-000-004-A
Removal of the MLG Uplock Pin

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	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	SCRAPER - NON METALLIC
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 29-00-00-864-001-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
MLG Leg Uplock Pin - Location and Detail ** ON A/C NOT FOR ALL
MLG Leg Uplock Pin - Location and Detail ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 32-11-11-941-061-A

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) On panel 400VU:

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

(3) Put a WARNING NOTICE(S) in the cockpit to tell persons not to pressurize the Green hydraulic system.
(4) Make sure that the ground safety locks are installed on the landing gear (Ref. AMM TASK 32-00-00-481-001).

Subtask 32-11-11-860-069-A

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

Subtask 32-11-11-869-064-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 32-11-11-865-063-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

4. Procedure
Subtask 32-11-11-020-067-A ** ON A/C NOT FOR ALL

A. Removal of the MLG Uplock Pin
(1) Use the SCRAPER - NON METALLIC to remove the sealant from:

The interface of the uplock pin assembly and the MLG attachment lugs
The shanks of the bolts (1)
The shank of the static discharge connector (2)
The washers (4).

(2) Remove and discard the cotter pins (6) from the nuts (5).
(3) Remove the nuts (5), the washers (4), the bolts (1) and the static discharge connector (2).
(4) Remove the uplock pin (3) from the MLG attachment lugs.

Subtask 32-11-11-020-067-D ** ON A/C NOT FOR ALL

A. Removal of the MLG Uplock Pin

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(1) Use the SCRAPER - NON METALLIC to remove the sealant from:

The area around the interface between the uplock pin (6) and the MLG attachment lugs
The ends of the ground stud (4), the washer (5) and the head of the ground stud bolt (7)
The ends of the nut (3), the washer (1) and the head of the bolt (8)
The ends of the nuts (11), the washers (12) and the head of the bolts (9).

(2) Remove and discard the lockwire from the ground stud (4) and the ground stud bolt (7).
(3) Remove the ground stud (4), the washer (5) and the ground stud bolt (7).
(4) Remove and discard the cotter pins (2) and (10) from the nuts (3) and (11).
(5) Remove the nut (3), the washer (1) and the bolt (8).
(6) Remove the nuts (11), the washers (12) and the bolts (9).
(7) Remove the uplock pin (6) from the MLG attachment lugs.

Subtask 32-11-11-020-067-E ** ON A/C NOT FOR ALL

A. Removal of the MLG Uplock Pin

(1) Use the SCRAPER - NON METALLIC to remove the sealant from:

The area around the interface between the uplock pin (6) and the MLG attachment lugs
The ends of the ground stud (4), the washer (5) and the head of the ground stud bolt (7)
The ends of the nut (3), the washer (1) and the head of the bolt (8)
The ends of the nuts (11), the washers (12) and the head of the bolts (9).

(2) Remove and discard the heat shrink tube and the lockwire from the ground stud (4) and the ground stud bolt (7).
(3) Remove the ground stud (4), the washer (5) and the ground stud bolt (7).
(4) Remove and discard the cotter pins (2) and (10) and the nuts (3) and (11).
(5) Remove the washers (1) and (12) and the bolts (8) and (9).
(6) Remove the uplock pin (6) from the MLG attachment lugs.

[Rev.10 from 2021] 2026.04.01 00:39:54 UTC