Installation of the MLG Actuating Cylinder Eye-End Pin

TASK 32-31-46-400-002-A
Installation of the MLG Actuating Cylinder Eye-End Pin

WARNING: MAKE SURE THAT THE SAFETY DEVICES AND THE WARNING NOTICES ARE IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES. WORK ON THE HYDRAULIC SYSTEMS CAN BE DANGEROUS.

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	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 3.0 and 2.4 m.daN (22.12 and 17.70 lbf.ft )
98D32104014000	1	GUIDE CONE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03GBB1)	Synthetic Oil base Grease-General Purpose Clay Thickened -
(Material No.03HBD9)	Synthetic Ester base Grease-General Purpose Low Temp -
(Material No.04QAB2)	Coating_- Flexible Structure
(Material No.06AAB1)	Polysulfide Sealant-General Purpose Fillet -
(Material No.06ACA1)	Polysulfide Sealant-Low Density Multi Purpose Brushable -
(Material No.06LDG6)	Non Hardening Jointing Putty-High Temp. Area - Hydraulic
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.08BBB1)	Non Aqueous Cleaner-- Petroleum Based -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	COTTER PIN	AIPC 32-31-46-01-160
8	COTTER PIN	AIPC 32-31-46-01-160
2	COTTER PIN	AIPC 32-31-85-10-160

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-22-32-640-001-A	Lubrication of Main Landing Gear and Doors
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 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 29-23-00-860-002-A	Connection 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 32-12-00-410-001-A	Close the Main Gear Doors after Access
CMM 323104	(for corrective action)
CMM 323147	(for corrective action)
CMM 323186	(for corrective action)
MLG Actuating Cylinder Eye-End Pin - Location and Detail ** ON A/C NOT FOR ALL
MLG Actuating Cylinder Eye-End Pin - Location and Detail ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 32-31-46-941-054-A

A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that the ground safety locks are installed on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On the panel 400VU:

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

(4) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate the hydraulic systems:

In the cockpit, on the HYD overhead panel 40VU
On the hydraulic ground service panels 197CB and 198CB
On the access door 195BB.

Subtask 32-31-46-860-053-A

B. Aircraft Maintenance Configuration
(1) Make sure that the Yellow and Green hydraulic systems have been depressurized (Ref. AMM TASK 29-00-00-864-001).
(2) Make sure that the applicable hydraulic reservoirs have been depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the isolation coupling of the PTU is disconnected (Ref. AMM TASK 29-23-00-860-001).

Subtask 32-31-46-869-055-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 flight configuration precautions with electrical power (Ref. AMM TASK 32-00-00-860-001) before you open the circuit breakers.

Subtask 32-31-46-865-053-A

D. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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 32-31-46-420-057-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Apply a thin layer of Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) or Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) to the interface of the pin (3).
(3) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(4) Do an inspection of the component interfaces and the adjacent area.

Subtask 32-31-46-420-057-C ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Apply Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) to the pin (6).
(5) Apply Non Hardening Jointing Putty-High Temp. Area - Hydraulic (Material No.06LDG6) to the bolt (8).

Subtask 32-31-46-420-058-A ** ON A/C NOT FOR ALL

B. Installation of the MLG Actuating Cylinder Eye-End Pin

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

(1) Engage the piston eye-end (4) in the attachment lugs of the MLG leg. Make sure that the greaser on the piston eye-end (4) points down.
(2) Use the 98D32104014000 GUIDE CONE to install the pin (3).
(3) Make sure that the greasers (2) point aft.
(4) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the interfaces of the:

Pin (3) with the cap (5)
Washer (6) with the cap (5)
Nut (7) with the washer (6)
Bolt (1) with the nut (7).

NOTE: You must not apply sealant to the interfaces of the:

Pin (3) and the MLG leg lugs
Cap (5) and the MLG leg lugs.

(5) Install the cap (5), the bolt (1), the washer (6) and the nut (7).
(6) TORQUE the nut (7) to between 3.0 and 2.4 m.daN (22.12 and 17.70 lbf.ft )

.
(7) Safety the nut (7) with the new AIPC 32-31-46-01-160 COTTER PIN (8).
(8) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the bolt (1) and the nut (7).

Subtask 32-31-46-420-058-D ** ON A/C NOT FOR ALL

B. Installation of the MLG Actuating Cylinder Eye-End Pin
(1) Engage the piston eye-end (5) in the attachment lugs of the MLG leg. Make sure that the greaser on the piston eye-end (5) points down.
(2) Use the 98D32104014000 GUIDE CONE to install the pin (6).
(3) Make sure that the greasers (7) point aft.
(4) Apply Polysulfide Sealant-Low Density Multi Purpose Brushable - (Material No.06ACA1) to the interfaces of the:

Pin (6) with the cap (1)
Washer (4) with the cap (1)
Nut (3) with the washer (4)
Bolt (8) with the nut (3).

NOTE: You must not apply sealant to the interfaces of the:

Pin (6) with the MLG leg lugs
Cap (1) with the MLG leg lugs.

(5) Remove 98D32104014000 GUIDE CONE.
(6) Install the cap (1), the bolt (8), the washer (4) and the nut (3).
(7) TORQUE the nut (3) to between 3.0 and 2.4 m.daN (22.12 and 17.70 lbf.ft )

.
(8) Safety the nut (3) with the new AIPC 32-31-46-01-160 COTTER PIN (2) or the new AIPC 32-31-85-10-160 COTTER PIN (2).
(9) Application of sealants:
(a) Apply Polysulfide Sealant-Low Density Multi Purpose Brushable - (Material No.06ACA1) to the:

Head of the bolt (8)
Nut (3)
Washer (4).

(b) Apply Coating_- Flexible Structure (Material No.04QAB2) to the sealant on the:

Head of the bolt (8)
Nut (3)
Washer (4).

Subtask 32-31-46-420-058-E ** ON A/C NOT FOR ALL

Pin (6) with the cap (1)
Washer (4) with the cap (1)
Nut (3) with the washer (4)
Bolt (8) with the nut (3).

NOTE: You must not apply sealant to the interfaces of the:

Pin (6) with the MLG leg lugs
Cap (1) with the MLG leg lugs.

(5) Remove 98D32104014000 GUIDE CONE.
(6) Install the cap (1), the bolt (8), the washer (4) and the nut (3).
(7) TORQUE the nut (3) to between 3.0 and 2.4 m.daN (22.12 and 17.70 lbf.ft )

Head of the bolt (8)
Nut (3)
Washer (4).

(b) Apply Coating_- Flexible Structure (Material No.04QAB2) to the sealant on the:

Head of the bolt (8)
Nut (3)
Washer (4).

Subtask 32-31-46-220-052-A ** ON A/C NOT FOR ALL

C. Dimensional Check

MLG Actuating Cylinder Eye-End Pin - Location and Detail ** ON A/C NOT FOR ALL

(1) Make sure that the dimensions Y1 and Y2 are more than zero at the anti-roll pegs (9). Dimensions Y1 and Y2 are the clearance when the opposite anti-roll peg is held against the washer (10).

NOTE: If the dimension Y1 or Y2 is not in the given tolerance, refer to CMM 323147 or CMM 323186 for corrective action.

Subtask 32-31-46-220-052-B ** ON A/C NOT FOR ALL

C. Dimensional Check

MLG Actuating Cylinder Eye-End Pin - Location and Detail ** ON A/C NOT FOR ALL

(1) Make sure that the dimensions Y1 and Y2 are more than zero at the anti-roll pegs (9). Dimensions Y1 and Y2 are the clearance when the opposite anti-roll peg is held against the washer (10).

NOTE: If the dimension Y1 or Y2 is not in the given tolerance, refer to CMM 323186 for corrective action.

Subtask 32-31-46-220-052-N ** ON A/C NOT FOR ALL

C. Dimensional Check

MLG Actuating Cylinder Eye-End Pin - Location and Detail ** ON A/C NOT FOR ALL

(1) Make sure that the dimensions Y1 and Y2 are more than zero at the anti-roll pegs (9). Dimensions Y1 and Y2 are the clearance when the opposite anti-roll peg is held against the washer (10).

NOTE: If the dimension Y1 or Y2 is not in the given tolerance, refer to CMM 323104 for corrective action.

Subtask 32-31-46-420-059-A

D. Continue with the Installation Procedure
(1) Lubricate the MLG actuating cylinder and fittings (Ref. AMM TASK 12-22-32-640-001).

Subtask 32-31-46-410-052-A

E. 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) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
(4) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).

Subtask 32-31-46-865-060-A

F. Remove the safety clip(s) and the tag(s) and close 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

5. Close-up
Subtask 32-31-46-942-051-A

A. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the SAFETY BARRIER(S).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:45:35 UTC