Installation of the MLG Actuating Cylinder

TASK 32-31-46-400-001-A
Installation of the MLG Actuating Cylinder

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: 571
ZONE: 671
ZONE: 731
ZONE: 741
FIN: 2503GM
FIN: 2504GM

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 3M (10 FT)- ADJUSTABLE
No specific	1	GAGE - FEELER
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 5 and 3 m.N (44.25 and 26.55 lbf.in )
No specific	Torque wrench: range to between 0.8 and 0.5 m.daN (70.80 and 44.25 lbf.in )
No specific	Torque wrench: range to between 1.8 and 0.9 m.daN (159.29 and 79.65 lbf.in )
No specific	Torque wrench: range to between 3.0 and 2.4 m.daN (22.12 and 17.70 lbf.ft )
No specific	Torque wrench: range to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )
No specific	Torque wrench: range to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )
98D32104009007	1	EQUIPMENT-R I OF THE MLG ACTUATOR
98D32104014000	1	GUIDE CONE
98D32104015000	1	GUIDE CONE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03GBB1)	Synthetic Oil base Grease-General Purpose Clay Thickened -
(Material No.03GBC1)	Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. -
(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.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
571	MLG BAY
671	MLG BAY
731	L.H MAIN GEAR
741	R.H MAIN GEAR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
35	COTTER PIN	AIPC 32-31-46-01-040
37	COTTER PIN	AIPC 32-31-46-01-040
40	COTTER PIN	AIPC 32-31-46-01-040
28	COTTER PIN	AIPC 32-31-46-01-160
34	COTTER PIN	AIPC 32-31-46-01-160
35	COTTER PIN	AIPC 32-31-46-01-160
40	COTTER PIN	AIPC 32-31-85-10-040
28	COTTER PIN	AIPC 32-31-85-10-160
9	COTTER PIN	AIPC 57-51-05-67-010
8	COTTER PIN	AIPC 57-51-05-67-015
9	COTTER PIN	AIPC 57-51-85-67-010
8	COTTER PIN	AIPC 57-51-85-67-020

E. Referenced Information

REFERENCE	DESIGNATION
TASK 07-11-00-581-001-A	Lifting for Aircraft Maintenance Operations
TASK 07-11-00-586-002-A	Lowering of the Aircraft for Maintenance Operations
TASK 12-22-32-640-001-A	Lubrication of Main Landing Gear and Doors
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
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
TASK 32-22-00-410-001-A	Nose Gear Doors - Ground Doors Closing
TASK 32-31-00-720-002-A	Functional Test of the Normal Extension and Retraction of the Landing Gear
TASK 32-31-46-600-001-A	Bleeding of the MLG Actuating Cylinder
CMM 323104	(for corrective action)
CMM 323147	(for corrective action)
CMM 323186	(for corrective action)
Overwing Panel Cover-Plate
MLG Actuating Cylinder - Removal/Installation Tools
MLG Actuating Cylinder - Location and Detail ** ON A/C NOT FOR ALL
MLG Actuating Cylinder - Location and Detail ** ON A/C NOT FOR ALL
MLG Actuating Cylinder - Location and Detail ** ON A/C NOT FOR ALL
MLG Actuating Cylinder - Location and Detail ** ON A/C NOT FOR ALL
MLG Actuating Cylinder - Location and Detail ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 32-31-46-941-052-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 32-31-46-860-051-A

B. Aircraft Maintenance Configuration
(1) Make sure that the aircraft is on jacks (Ref. AMM TASK 07-11-00-581-001).
(2) Make sure that the Green and Yellow hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
(3) Make sure that the applicable hydraulic reservoirs are depressurized (Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that the isolation coupling of the Power Transfer Unit (PTU) is disconnected (Ref. AMM TASK 29-23-00-860-001).
(5) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position:
(a) FOR [2503GM] (ACTG CYL-MLG, L)

Below zone 571.

(b) FOR [2504GM] (ACTG CYL-MLG, R)

Below zone 671.

Subtask 32-31-46-869-053-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 with electrical power before you open the circuit breakers (Ref. AMM TASK 32-00-00-860-001).

Subtask 32-31-46-865-051-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 32-31-46-420-050-D ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) 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) or Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. - (Material No.03GBC1) to the interfaces of the:

Pins (20) and (26)
Bearings (25) and (44)
Bushes in the fork end (45) of the actuating cylinder.

(2) Clean the component interface and/or the adjacent area with Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Do an inspection of the component interfaces and the adjacent area.
(5) Use the necessary lifting equipment to lift the actuating cylinder into position.
(6) Make sure that the manifold (23) is at the top:

98D32104009001 REM., INST. EQUIPMENT - MLG ACTUATOR (15) with the HOIST 50 KG (110 LB), or
98D32104009003 EQUIPMENT-R I OF THE MLG ACTUATOR (15), or
98D32104009006 EQUIPMENT-R I OF THE MLG ACTUATOR (15) and the HOIST 50 KG (110 LB), or
98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15).

(7) Engage the piston eye-end (30) in the attachment lugs of the MLG leg. Make sure that the greaser on the piston eye-end (30) points down.
(8) Install the washer (29) at each side of the bearing (25).
(9) Use the 98D32104014000 GUIDE CONE to install the pin (26).
(10) Make sure that the greasers (27) point aft.

Subtask 32-31-46-420-050-E ** ON A/C NOT FOR ALL

Pins (20) and (27)
Bearings (26) and (45)
Bushes in the fork end (46) of the actuating cylinder.

98D32104009001 REM., INST. EQUIPMENT - MLG ACTUATOR (15) with the HOIST 50 KG (110 LB), or
98D32104009003 EQUIPMENT-R I OF THE MLG ACTUATOR (15), or
98D32104009006 EQUIPMENT-R I OF THE MLG ACTUATOR (15) and the HOIST 50 KG (110 LB), or
98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15).

(7) Engage the piston eye-end (31) in the attachment lugs of the MLG leg. Make sure that the greaser on the piston eye-end (31) points down.
(8) Install the washers (30) at each side of the bearing (26).
(9) Use the 98D32104014000 GUIDE CONE to install the pin (27).
(10) Make sure that the greasers (28) point aft.

Subtask 32-31-46-420-050-F ** ON A/C NOT FOR ALL

Pins (20) and (26)
Bearings (25) and (46)
Bushes in the fork end (47) of the actuating cylinder.

98D32104009001 REM., INST. EQUIPMENT - MLG ACTUATOR (15) with the HOIST 50 KG (110 LB), or
98D32104009003 EQUIPMENT-R I OF THE MLG ACTUATOR (15), or
98D32104009006 EQUIPMENT-R I OF THE MLG ACTUATOR (15) and the HOIST 50 KG (110 LB), or
98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15).

(7) Engage the piston eye-end (30) in the attachment lugs of the MLG leg. Make sure that the greaser on the piston eye-end (30) points down.
(8) Install the washers (29) at each side of the bearing (25).
(9) Use the 98D32104014000 GUIDE CONE to install the pin (26).
(10) Make sure that the greasers (27) point aft.

Subtask 32-31-46-420-050-G ** ON A/C NOT FOR ALL

Pins (20) and (26)
Bearings (25) and (46)
Bushes in the fork end (47) of the actuating cylinder.

98D32104009001 REM., INST. EQUIPMENT - MLG ACTUATOR (15) with the HOIST 50 KG (110 LB), or
98D32104009003 EQUIPMENT-R I OF THE MLG ACTUATOR (15), or
98D32104009006 EQUIPMENT-R I OF THE MLG ACTUATOR (15) and the HOIST 50 KG (110 LB), or
98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15).

Subtask 32-31-46-420-050-H ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Apply a thin layer of Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) to the interfaces of the:

Pins (20) and (32)
Bearings (25) and (44).

(2) Clean the component interface and/or the adjacent area with Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Do an inspection of the component interfaces and the adjacent area.
(5) Apply Non Hardening Jointing Putty-High Temp. Area - Hydraulic (Material No.06LDG6) to the bolt (34).
(6) Use 98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15) to lift the actuating cylinder into position.
(7) Make sure that the manifold (23) is at the top.
(8) Engage the piston eye-end (31) in the attachment lugs of the MLG leg. Make sure that the greaser on the piston eye-end (31) points down.
(9) Install the washers (26) at each side of the bearing (25).
(10) Use the 98D32104014000 GUIDE CONE to install the pin (32).
(11) Make sure that the greasers (33) point aft.

Subtask 32-31-46-420-051-C ** ON A/C NOT FOR ALL

B. Installation of the MLG Actuating Cylinder

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) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the interface of the:

Pin (27) and the cap (32)
Washer (33) and the cap (32)
Nut (34) and the washer (33)
Bolt (29) and the nut (34).

(a) Do not apply the sealant to the interface of the:

Pin (27) and the MLG leg lugs
Cap (32) and the MLG leg lugs.

(2) Install the cap (32), bolt (29), washer (33) and nut (34).
(3) TORQUE the nut (34) to between 3.0 and 2.4 m.daN (22.12 and 17.70 lbf.ft )

.
(4) Safety the nut (34) with the new AIPC 32-31-46-01-160 COTTER PIN (35).
(5) Align the fork end (46) with the actuator mounting bracket (44). Make sure that the anti-roll pegs (42) are at the top.
(6) Install a washer (43) on each side of the actuator mounting bracket (44).
(7) Use the 98D32104015000 GUIDE CONE to install the pin (20).
(8) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the interface of the:

Bottom end of the pin (20)
Collar (36)
Bolt (41)
Washer (39)
Nylon-washer (40)
Nut (38).

(9) Put the collar (36) on the pin (20) and install it with the:

Bolt (41)
Nylon-washer (40)
Washer (39)
Nut (38).

(10) Tighten the nut (38) on the thread of the bolt (41).
(11) TORQUE the nut (38) to between 1.8 and 0.9 m.daN (159.29 and 79.65 lbf.in )

and align with the hole for the cotter pin (37).
(12) Safety the nut (38) with the new AIPC 32-31-46-01-040 COTTER PIN (37).

Subtask 32-31-46-420-051-D ** ON A/C NOT FOR ALL

B. Installation of the MLG Actuating Cylinder

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) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the interface of the:

Pin (26) and the cap (31)
Washer (32) and the cap (31)
Nut (33) and the washer (32)
Bolt (28) and the nut (33).

(a) Do not apply the sealant to the interface of the:

Pin (26) and the MLG leg lugs
Cap (31) and the MLG leg lugs.

(2) Install the cap (31), bolt (28), washer (32) and nut (33).
(3) TORQUE the nut (33) to between 3.0 and 2.4 m.daN (22.12 and 17.70 lbf.ft )

.
(4) Safety the nut (33) with the new AIPC 32-31-46-01-160 COTTER PIN (34).
(5) Align the fork end (45) with the actuator mounting bracket (43). Make sure that the anti-roll pegs (42) are at the top.
(6) Install a washer (41) on each side of the actuator mounting bracket (43).
(7) Use the 98D32104015000 GUIDE CONE to install the pin (20).
(8) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the interface of the:

Bottom end of the pin (20)
Collar (40)
Bolt (39)
Washer (37)
Nylon-washer (38)
Nut (36).

(9) Put the collar (40) on the pin (20) and install it with the:

Bolt (39)
Nylon-washer (38)
Washer (37)
Nut (36).

(10) TORQUE the nut (36) to between 1.8 and 0.9 m.daN (159.29 and 79.65 lbf.in )

and align with the hole for the cotter pin (35).
(11) Safety the nut (36) with the new AIPC 32-31-46-01-040 COTTER PIN (35).

Subtask 32-31-46-420-051-F ** ON A/C NOT FOR ALL

B. Installation of the MLG Actuating Cylinder

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) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the interface of the:

Pin (26) and the cap (31)
Washer (32) and the cap (31)
Nut (33) and the washer (32)
Bolt (28) and the nut (33).

(a) Do not apply the sealant to the interface of the:

Pin (26) and the MLG leg lugs
Cap (31) and the MLG leg lugs.

(2) Install the cap (31), the bolt (28), the washer (32) and the nut (33).
(3) TORQUE the nut (33) to between 3.0 and 2.4 m.daN (22.12 and 17.70 lbf.ft )

.
(4) Safety the nut (33) with the new AIPC 32-31-46-01-160 COTTER PIN (34).
(5) Align the fork end (47) with the actuator mounting bracket (45). Make sure that the anti-roll pegs (44) are at the top.
(6) Install a washer (43) on each side of the actuator mounting bracket (45).
(7) Use the 98D32104015000 GUIDE CONE to install the pin (20).
(8) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the interfaces of the:

Bottom end of the pin (20)
Collar (42)
Bolt (41)
Washer (40), if applicable
Nylon-washer (39)
Washer (38), if applicable
Washer (37)
Nut (36).

(9) Put the collar (42) on the pin (20) and install it with the:

Bolt (41)
Washer (40), if applicable
Nylon-washer (39)
Washer (38), if applicable
Washer (37)
Nut (36).

(10) TORQUE the nut (36) to between 0.8 and 0.5 m.daN (70.80 and 44.25 lbf.in )

.
(11) Safety the nut (36) with the new AIPC 32-31-46-01-040 COTTER PIN (35).

Subtask 32-31-46-420-051-G ** ON A/C NOT FOR ALL

B. Installation of the MLG Actuating Cylinder

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) Apply Polysulfide Sealant-Low Density Multi Purpose Brushable - (Material No.06ACA1) to the interface of the:

Pin (32) and the cap (27)
Washer (30) and the cap (27)
Nut (29) and the washer (30)
Bolt (34) and the nut (29).

(a) Do not apply the sealant to the interface of the:

Pin (32) and the MLG leg lugs
Cap (27) and the MLG leg lugs.

(2) Install the cap (27), the bolt (34), the washer (30) and the nut (29).
(3) TORQUE the nut (29) to between 3.0 and 2.4 m.daN (22.12 and 17.70 lbf.ft )

.
(4) Safety the nut (29) with the new AIPC 32-31-46-01-160 COTTER PIN (28) or the new AIPC 32-31-85-10-160 COTTER PIN (28).
(5) Align the fork end (45) with the actuator mounting bracket (43). Make sure that the anti-roll pegs (41) are at the top.
(6) Install a washer (42) on each side of the actuator mounting bracket (43).
(7) Put the collar (36) on the pin (20) and install it with the:

Bolt (35)
Nylon-washer (37)
Washer (38)
Nut (39).

(8) TORQUE the nut (39) to between 0.8 and 0.5 m.daN (70.80 and 44.25 lbf.in )

.
(9) Safety the nut (39) with the new AIPC 32-31-46-01-040 COTTER PIN (40) or the new AIPC 32-31-85-10-040 COTTER PIN (40).
(10) Application of sealants:
(a) Apply Polysulfide Sealant-Low Density Multi Purpose Brushable - (Material No.06ACA1) to the:

Head of the bolts (34) and (35)
Nuts (29) and (39)
Washers (30) and (38)
Nylon-washer (37).

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

Head of the bolts (34) and (35)
Nuts (29) and (39)
Washers (30) and (38)
Nylon-washer (37).

Subtask 32-31-46-420-051-H ** ON A/C NOT FOR ALL

B. Installation of the MLG Actuating Cylinder

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) Apply Polysulfide Sealant-Low Density Multi Purpose Brushable - (Material No.06ACA1) to the interface of the:

Pin (32) and the cap (27)
Washer (30) and the cap (27)
Nut (29) and the washer (30)
Bolt (34) and the nut (29).

(a) Do not apply the sealant to the interface of the:

Pin (32) and the MLG leg lugs
Cap (27) and the MLG leg lugs.

(2) Install the cap (27), the bolt (34), the washer (30) and the nut (29).
(3) TORQUE the nut (29) to between 3.0 and 2.4 m.daN (22.12 and 17.70 lbf.ft )

.
(4) Safety the nut (29) with the new AIPC 32-31-46-01-160 COTTER PIN (28) or AIPC 32-31-85-10-160 COTTER PIN (28).
(5) Align the fork end (45) with the actuator mounting bracket (43). Make sure that the anti-roll pegs (41) are at the top.
(6) Install a washer (42) on each side of the actuator mounting bracket (43).
(7) Put the collar (36) on the pin (20) and install it with the:

Bolt (35)
Nylon-washer (37)
Washer (38)
Nut (39).

(8) TORQUE the nut (39) to between 0.8 and 0.5 m.daN (70.80 and 44.25 lbf.in )

.
(9) Safety the nut (39) with the new AIPC 32-31-46-01-040 COTTER PIN (40) or AIPC 32-31-85-10-040 COTTER PIN (40).
(10) Application of sealants:
(a) Apply Polysulfide Sealant-Low Density Multi Purpose Brushable - (Material No.06ACA1) to the:

Heads of the bolts (34) and (35)
Nuts (29) and (39)
Washers (30) and (38)
Nylon-washer (37).

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

Heads of the bolts (34) and (35)
Nuts (29) and (39)
Washers (30) and (38)
Nylon-washer (37).

Subtask 32-31-46-220-050-A ** ON A/C NOT FOR ALL

C. Dimensional Check

MLG Actuating Cylinder - 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 (25). Dimensions Y1 and Y2 are the clearance when the opposite anti-roll peg is held against the washer (30).
(2) Make sure that the dimension X is between 1.8 mm (0.0709 in.) and 6.1 mm (0.2402 in.), at one of the anti-roll pegs (42). Dimension X is the clearance when the opposite anti-roll peg is held against the washer (43).

NOTE: If the dimensions Y1, Y2 or X are not in the given tolerances, refer to CMM 323147 or CMM 323186 for fits and clearances of the applicable components.

Subtask 32-31-46-220-050-C ** ON A/C NOT FOR ALL

C. Dimensional Check

MLG Actuating Cylinder - 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 (24). Dimensions Y1 and Y2 are the clearance when the opposite anti-roll peg is held against the washer (29).
(2) Make sure that the dimension X is between 1.8 mm (0.0709 in.) and 6.1 mm (0.2402 in.), at one of the anti-roll pegs (42). Dimension X is the clearance when the opposite anti-roll peg is held against the washer (41).

NOTE: If the dimensions Y1, Y2 or X are not in the given tolerances, refer to CMM 323186 for fits and clearances of the applicable components.

Subtask 32-31-46-220-050-G ** ON A/C NOT FOR ALL

C. Dimensional Check

MLG Actuating Cylinder - 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 (24). Dimensions Y1 and Y2 are the clearance when the opposite anti-roll peg is held against the washer (29).
(2) Make sure that the dimension X is between 1.8 mm (0.0709 in.) and 6.1 mm (0.2402 in.), at one of the anti-roll pegs (44). Dimension X is the clearance when the opposite anti-roll peg is held against the washer (43).

NOTE: If the dimensions Y1, Y2 or X are not in the given tolerances, refer to CMM 323147 or CMM 323186 for fits and clearances of the applicable components.

Subtask 32-31-46-220-050-H ** ON A/C NOT FOR ALL

C. Dimensional Check

MLG Actuating Cylinder - 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 (24). Dimensions Y1 and Y2 are the clearance when the opposite anti-roll peg is held against the washer (29).
(2) Make sure that the dimension X is between 1.8 mm (0.0709 in.) and 6.1 mm (0.2402 in.), at one of the anti-roll pegs (44). Dimension X is the clearance when the opposite anti-roll peg is held against the washer (43).

NOTE: If the dimensions Y1, Y2 or X are not in the given tolerances, refer to CMM 323186 for fits and clearances of the applicable components.

Subtask 32-31-46-220-050-M ** ON A/C NOT FOR ALL

C. Dimensional Check

MLG Actuating Cylinder - 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 (24). Dimensions Y1 and Y2 are the clearance when the opposite anti-roll peg is held against the washer (26).
(2) Make sure that the dimension X is between 1.8 mm (0.0709 in.) and 6.1 mm (0.2402 in.), at one of the anti-roll pegs (41). Dimension X is the clearance when the opposite anti-roll peg is held against the washer (42).

NOTE: If the dimensions Y1, Y2 or X are not in the given tolerances, refer to CMM 323104 for fits and clearances of the applicable components.

Subtask 32-31-46-080-050-C ** ON A/C NOT FOR ALL

D. Removal of Support Equipment
(1) Remove the 98D57004019000 SLIPPER BLOCK(REAR SPAR ATTACHMENT BRACKET-ACTUATOR).
(2) Remove the 98D32104009001 REM., INST. EQUIPMENT - MLG ACTUATOR (15), the hoist (if applicable) and the grommet (5).

Subtask 32-31-46-080-050-D ** ON A/C NOT FOR ALL

D. Removal of Support Equipment
(1) Remove the 98D57004019001 SLIPPER BLOCK.
(2) Remove the 98D32104009001 REM., INST. EQUIPMENT - MLG ACTUATOR (15), the hoist (if applicable) and the grommet (5).

Subtask 32-31-46-080-050-E ** ON A/C NOT FOR ALL

D. Removal of Support Equipment
(1) Remove the 98D57004019000 SLIPPER BLOCK(REAR SPAR ATTACHMENT BRACKET-ACTUATOR).
(2) Remove the 98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15) and the grommet (5).

Subtask 32-31-46-420-054-C ** ON A/C NOT FOR ALL

E. Connection of the Flexible Hoses

CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.

(1) Remove the PLUG-BLANKING from each disconnected line end.
(2) Connect the unions of the flexible hoses (21) and (22) on the manifold (23).
(3) TORQUE the union of the flexible hose (21) to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

.
(4) TORQUE the union of the flexible hose (22) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(5) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).

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.

(6) Safety the unions of the flexible hoses (21) and (22) together with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(7) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) with Non Aqueous Cleaner-General - - (Material No.08BAA9) to:

Remove the unwanted hydraulic fluid from the flexible hoses (21) and (22) and the manifold (23)
Clean the bolt (28) and the nut (33)
Clean the bolt (39) and the nut (36).

(8) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the:

Bolt (28) and the nut (33)
Bolt (39) and the nut (36).

Subtask 32-31-46-420-054-E ** ON A/C NOT FOR ALL

E. Connection of the Flexible Hoses

CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.

.
(4) TORQUE the union of the flexible hose (22) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(5) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).

Remove the unwanted hydraulic fluid from the flexible hoses (21) and (22) and the manifold (23)
Clean the bolt (29) and the nut (34)
Clean the bolt (41) and the nut (38).

(8) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the:

Bolt (29) and the nut (34)
Bolt (41) and the nut (38).

Subtask 32-31-46-420-054-F ** ON A/C NOT FOR ALL

E. Connection of the Flexible Hoses

CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.

.
(4) TORQUE the union of the flexible hose (22) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(5) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).

Remove the unwanted hydraulic fluid from the flexible hoses (21) and (22) and the manifold (23)
Clean the bolt (28) and the nut (33)
Clean the bolt (41) and the nut (36).

(8) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the:

Bolt (28) and the nut (33)
Bolt (41) and the nut (36).

Subtask 32-31-46-420-054-G ** ON A/C NOT FOR ALL

E. Connection of the Flexible Hoses

CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.

.
(4) TORQUE the union of the flexible hose (22) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(5) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).

Remove the unwanted hydraulic fluid from the flexible hoses (21) and (22) and the manifold (23)
Clean the bolt (28) and the nut (33)
Clean the bolt (41) and the nut (36).

(8) Apply a thin layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the:

Bolt (28) and the nut (33)
Bolt (41) and the nut (36).

Subtask 32-31-46-420-054-H ** ON A/C NOT FOR ALL

E. Connection of the Flexible Hoses

CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.

(1) Remove the PLUG-BLANKING from each disconnected line end.
(2) Install the unions of the flexible hoses (21) and (22) on the manifold (23).
(3) TORQUE the union of the flexible hose (21) to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

.
(4) TORQUE the union of the flexible hose (22) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(5) Safety the unions of the flexible hoses (21) and (22) together with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.

Subtask 32-31-46-865-059-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

Subtask 32-31-46-870-050-B

G. Bleed the MLG Actuating Cylinder
(1) Bleed the MLG actuating cylinder (Ref. AMM TASK 32-31-46-600-001).

Subtask 32-31-46-420-055-A

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

Subtask 32-31-46-410-050-B

I. Close Access

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) Install the cover plates (1) and (2) as follows:

Overwing Panel Cover-Plate

(a) Put the cover plates (1) and (2) in position on the wing.
(b) Install the bridge plates (3) and (4) and the nuts (6) and (7).
(c) Torque the nuts (6) and (7) as follows:
1 TORQUE the nuts (6) and (7) to between 5 and 3 m.N (44.25 and 26.55 lbf.in )

.
2 If necessary, loosen the nuts (6) and (7) until you can align the holes for the cotter pins (8) and (9).
3 To make sure that the nuts (6) and (7) are sufficiently tight:
a Use the 0.05 MM (0.0020 IN.) GAGE - FEELER and make sure that it does not go in the space between:

The nut (6) and the bridge plate (3)
The nut (7) and the bridge plate (4).

(d) Safety the nut (6) with the new AIPC 57-51-05-67-015 COTTER PIN (8) or AIPC 57-51-85-67-020 COTTER PIN (8).
(e) Safety the nut (7) with the new AIPC 57-51-05-67-010 COTTER PIN (9) or AIPC 57-51-85-67-010 COTTER PIN (9).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the access platform(s).
(4) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
(5) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
(6) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).

Subtask 32-31-46-720-050-A

J. Test
(1) Do a functional test of the MLG (Ref. AMM TASK 32-31-00-720-002).
(2) Examine the applicable MLG actuating cylinder for leaks. Leaks are not permitted.

5. Close-up
Subtask 32-31-46-586-050-A

A. Lower the Aircraft
(1) Lower the aircraft off jacks (Ref. AMM TASK 07-11-00-586-002).

Subtask 32-31-46-942-050-A

B. 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 00:45:33 UTC