Installation of the NLG Lockstay Assy

TASK 32-21-17-400-001-A
Installation of the NLG Lockstay Assy

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

WARNING: MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM. UNWANTED MOVEMENT OF HYDRAULICALLY OPERATED ITEMS CAN CAUSE SERIOUS INJURY AND/OR DAMAGE.

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

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

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	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 2 and 1.7 m.daN (14.75 and 12.54 lbf.ft )
No specific	Torque wrench: range to between 3 and 2.5 m.daN (22.12 and 18.44 lbf.ft )
D23080000	1	PIN-GROUND LOCK,NLG
J47557	1	GUIDE CONE
J47587	1	GUIDE CONE
J47588	1	GUIDE CONE
MZ23080000	1	PIN-LOCKING

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.06AAA1)	Polysulfide Sealant_General Purpose Brushable -
(Material No.06AAB1)	Polysulfide Sealant-General Purpose Fillet -
(Material No.06AAC5)	Polysulfide Sealant-General Purpose Interfay Landing Gear
(Material No.06ABF1)	Polysulfide Sealant-Fuel Tank Quick Curing -
(Material No.06LDG2)	Non Hardening Jointing Putty-High Temp. Area - Structure
(Material No.08BAA9)	Non Aqueous Cleaner-General - -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
6	COTTER PIN	AIPC 32-21-11-21-010
6	COTTER PIN	AIPC 32-21-11-41-010
6	COTTER PIN	AIPC 32-21-11-61-010
6	COTTER PIN	AIPC 32-21-11-81-010
22	COTTER PIN	AIPC 32-21-16-03-235
12	COTTER PIN	AIPC 32-21-17-02-060

D. Referenced Information

REFERENCE	DESIGNATION
TASK 07-11-00-581-003-A	Lifting of the Aircraft at the Forward Jacking Point, MLG Wheels on the Ground
TASK 07-11-00-586-001-A	Lowering of the Aircraft at Forward Jacking Point, MLG Wheels on the Ground
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 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 32-00-00-860-002-A	Ground Configuration after Flight Configuration with Electrical Power
TASK 32-00-00-860-002-A-01	Ground Configuration after Flight Configuration without Electrical Power
TASK 32-21-18-400-001-A	Installation of the NLG Lock Springs
TASK 32-22-00-010-001-A	Nose Gear Doors - Ground Doors Opening
TASK 32-22-00-410-001-A	Nose Gear Doors - Ground Doors Closing
TASK 32-31-00-720-003-A	Functional Test of the Normal Extension and Retraction of the Nose Landing Gear
TASK 32-31-73-400-005-A	Installation of the NLG Proximity-Sensors
TASK 12-22-00-00	LUBRICATION - DESCRIPTION AND OPERATION
NLG Lockstay Assembly

3. Job Set-up
Subtask 32-21-17-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001)
(2) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the aircraft is lifted with jacks (Ref. AMM TASK 07-11-00-581-003).
(4) In the cockpit, on the panel 400VU, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate the landing gear control lever.
(5) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Green hydraulic system:

on the panel 40VU in the cockpit,
on the ground service panel of the Green hydraulic system, access door (197CB).

(6) Make sure that the SAFETY BARRIER(S) are in position.
(7) Make sure that the doors of the nose landing gear are open (Ref. AMM TASK 32-22-00-010-001).
(8) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below the lockstay assembly in zone 123.
(9) Make sure that you obeyed the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).

Subtask 32-21-17-860-051-B ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001)
(2) Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the aircraft is lifted with jacks (Ref. AMM TASK 07-11-00-581-003).
(4) In the cockpit, on the panel 400VU, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate the landing gear control lever.
(5) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:

on the panel 40VU in the cockpit,
on the ground service panel of the Yellow hydraulic system, access door (196BB).

Subtask 32-21-17-865-051-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34

4. Procedure
Subtask 32-21-17-210-050-A

A. Preparation for Installation
(1) Clean the attachment hardware with Non Aqueous Cleaner-General - - (Material No.08BAA9) and dry with filtered compressed air.
(2) Apply a light coat of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threads of all the screws, bolts and nuts.
(3) Install the D23080000 PIN-GROUND LOCK,NLG or MZ23080000 PIN-LOCKING as an alternative on the new lockstay assy to make its handling easier.

Subtask 32-21-17-420-050-B ** ON A/C NOT FOR ALL

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.

B. Installation of the Lockstay Assembly

NOTE: For lubricant grease specification and lubrication requirements, (Ref. AMM D/O 12-22-00-00).

(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) on the pin (10).
(2) Put the lockstay assembly (23) on the gear leg.
(3) Install the pin (10), spacer (11), lockstay assembly (23) and washer (25) with the J47557 GUIDE CONE.
(4) Put the rigging holes of the pin (10) in the vertical position.
(5) Remove the J47557 GUIDE CONE.
(6) Install the actuator (8) on the pin (10).
(7) Install the ring (3) and align the rigging holes.
(8) Apply a thin layer of Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) to the screw (1) and the nut (7).
(9) Install the bushing (4), the washers (5) and (2) and the screw (1).
(10) TORQUE the nut (7) to between 2 and 1.7 m.daN (14.75 and 12.54 lbf.ft )

.
(11) Safety the nut (7) with the new AIPC 32-21-11-41-010 COTTER PIN (6) or AIPC 32-21-11-61-010 COTTER PIN (6) or AIPC 32-21-11-81-010 COTTER PIN (6).
(12) 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) on the bolt (17).
(13) Align the bores of the drag strut (19) with the bores of the spherical joint on the lockstay assembly (23).
(14) Install the bolt (17) and the washers (20) and (18) with the J47588 GUIDE CONE.
(15) TORQUE the nut (21) to between 3 and 2.5 m.daN (22.12 and 18.44 lbf.ft )

.
(16) Safety the nut (21) with the new AIPC 32-21-16-03-235 COTTER PIN (22).
(17) 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) on the bolt (24).
(18) Install the washer (16), actuator (15) and washer (14) with the J47587 GUIDE CONE.
(19) TORQUE the nut (13) to between 3 and 2.5 m.daN (22.12 and 18.44 lbf.ft )

.
(20) Safety the nut (13) with the new AIPC 32-21-17-02-060 COTTER PIN (12).
(21) Install the lock springs (Ref. AMM TASK 32-21-18-400-001).
(22) Install the NLG downlock proximity-sensors 18GA (system 1) and 19GA (system 2) (Ref. AMM TASK 32-31-73-400-005).
(23) Install the clamps (27) and (29) on the bracket (28).
(24) Install the screw (26), washer (30) and nut (31).
(25) Tighten the nut (31).
(26) Apply Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) or Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) or Polysulfide Sealant-General Purpose Interfay Landing Gear (Material No.06AAC5) to zones E.

Subtask 32-21-17-420-050-C ** ON A/C NOT FOR ALL

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.

B. Installation of the Lockstay Assembly

NOTE: For lubricant grease specification and lubrication requirements, (Ref. AMM D/O 12-22-00-00).

.
(11) Safety the nut (7) with the new AIPC 32-21-11-41-010 COTTER PIN (6) or AIPC 32-21-11-21-010 COTTER PIN (6).
(12) 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) on the bolt (17).
(13) Align the bores of the drag strut (19) with the bores of the spherical joint on the lockstay assembly (23).
(14) Install the bolt (17) and the washers (20) and (18) with the J47588 GUIDE CONE.
(15) TORQUE the nut (21) to between 3 and 2.5 m.daN (22.12 and 18.44 lbf.ft )

Subtask 32-21-17-865-052-A

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34

Subtask 32-21-17-869-053-A

D. Aircraft Maintenance Configuration
(1) After you close the LGCIU circuit breakers, put the aircraft back to the correct (ground) condition (Ref. AMM TASK 32-00-00-860-002).
(2) Remove the access platform(s).

Subtask 32-21-17-410-050-A

E. Close Access
(1) Close the doors of the nose gear (Ref. AMM TASK 32-22-00-410-001).

Subtask 32-21-17-720-050-A

F. Functional Test
(1) Do the functional test of the NLG normal extension and retraction. (Ref. AMM TASK 32-31-00-720-003)

Subtask 32-21-17-581-050-A

G. Lowering of the Aircraft
(1) Lower the aircraft with the jacks (Ref. AMM TASK 07-11-00-586-001).

5. Close-up
Subtask 32-21-17-942-050-A

A. Put the aircraft back to its initial configuration.
(1) Remove the WARNING NOTICE(S).
(2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:42:19 UTC