Installation of the Nose Landing Gear (NLG) Drag-Strut Assy (EV NLG)

TASK 32-21-16-400-002-A-02
Installation of the Nose Landing Gear (NLG) Drag-Strut Assy (EV NLG)

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.

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

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.

FIN: 2528GM

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 3M (10 FT)- ADJUSTABLE
No specific	1	HOIST 500 KG (1100 LB)
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 20 and 17 m.N (14.75 and 12.54 lbf.ft )
No specific	Torque wrench: range to between 30 and 25 m.N (22.12 and 18.44 lbf.ft )
No specific	Torque wrench: range to between 0.6 and 0.5 m.daN (53.10 and 44.25 lbf.in )
No specific	Torque wrench: range to between 0.61 and 0.6 m.daN (53.98 and 53.10 lbf.in )
No specific	Torque wrench: range to between 0.75 and 0.6 m.daN (66.37 and 53.10 lbf.in )
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 2.56 and 2.16 m.daN (18.88 and 15.93 lbf.ft )
No specific	Torque wrench: range to between 3 and 2.5 m.daN (22.12 and 18.44 lbf.ft )
98D32203500000	1	TOOL-R I NLG
98D32203502000	1	SAFETY PIN - NLG DOOR
J47554	1	GUIDE CONE
M21931	1	HOISTING DEVICE

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.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 - -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	COTTER PIN	AIPC 32-21-11-42-050
4	COTTER PIN	AIPC 32-21-11-62-050
4	COTTER PIN	AIPC 32-21-11-82-050
19	COTTER PIN	AIPC 32-21-16-02-010
23	COTTER PIN	AIPC 32-21-16-02-010
47	COTTER PIN	AIPC 32-21-16-02-010
51	COTTER PIN	AIPC 32-21-16-02-010
59	COTTER PIN	AIPC 32-21-16-02-010
10	PACKINGS	AIPC 32-21-16-02-060
23	COTTER PIN	AIPC 32-21-16-03-010
30	LOCK PLATE	AIPC 32-21-16-03-120
36	SHIM	AIPC 32-21-16-03-170
37	SHIM	AIPC 32-21-16-03-180
38	SHIM	AIPC 32-21-16-03-190
39	SHIM	AIPC 32-21-16-03-200
40	SHIM	AIPC 32-21-16-03-210
12	WASHER	AIPC 32-21-16-03-281
13	WASHER	AIPC 32-21-16-03-282
14	WASHER	AIPC 32-21-16-03-284
15	WASHER	AIPC 32-21-16-03-286

D. Referenced Information

REFERENCE	DESIGNATION
TASK 07-11-00-581-001-A	Lifting for Aircraft Maintenance Operations
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 12-22-32-640-002-A	Lubrication of Nose Landing Gear and Doors
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 32-21-17-400-001-A	Installation of the NLG Lockstay Assy
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 32-30-00-867-001-A	Retraction of the Landing Gears for Maintenance
TASK 32-30-00-867-002-A	Extension of the Landing Gears after Maintenance
TASK 32-31-00-720-003-A	Functional Test of the Normal Extension and Retraction of the Nose Landing Gear
TASK 12-22-00-00	LUBRICATION - DESCRIPTION AND OPERATION
Upper Connections ** ON A/C NOT FOR ALL
Roller ** ON A/C NOT FOR ALL
Lower connection of the NLG Drag-Strut Assy
Functional gaps
Nose Gear Door - Control Rod
Upper Connections ** ON A/C NOT FOR ALL
Roller ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 32-21-16-860-054-A

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 nose of the aircraft is lifted on jacks (Ref. AMM TASK 07-11-00-581-001) (Ref. AMM TASK 07-11-00-581-003).
(4) In the cockpit, on the right center instrument 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:

In the cockpit, on the HYD panel 40VU
On the ground service panel of the Green hydraulic system, at access door 197CB.

(6) Make sure that the SAFETY BARRIER(S) are in position.
(7) Make sure that the NLG doors are open (Ref. AMM TASK 32-22-00-010-001).
(8) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position in zone 123.
(9) Make sure that you obeyed the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).

Subtask 32-21-16-865-063-A

B. 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
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY	4GG	M36
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/CTL	3GG	M35
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/CTL	1GG	M34
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY	2GG	M33
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34

4. Procedure
Subtask 32-21-16-110-053-A

A. Preparation for Installation
(1) Clean the removed parts with Non Aqueous Cleaner-General - - (Material No.08BAA9) and dry them with filtered compressed air.
(2) For lubricant grease specification and lubrication requirements, refer to (Ref. AMM D/O 12-22-00-00).
(3) Apply a thin layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threads of all the nuts, screws, bolts and pins.
(4) Apply a thin layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the bushes (8) and the bolts (11) but not on the threads.
(5) Apply a thin layer of Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) or Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the pins and the washers.

Subtask 32-21-16-420-053-A ** ON A/C NOT FOR ALL

B. Installation of the NLG Drag-Strut Assy

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.

NOTE: It is recommended to assemble the drag strut (7) with the identification plate in the direction of the ground to see identification plate more easily.

(b) Engage the trunnion pins (16) (do not engage them fully) in the spherical bearings and put the drag strut (7) against one of the bearings.
(c) On the opposite side, measure the clearance between the spherical bearing and the drag strut (7).
(d) Make a selection of two washers from the list that follows to get a clearance of between 0.2 mm (0.0079 in.) and 0.5 mm (0.0197 in.):

1 You must install only one washer on each side. The two washers can have different dimensions.
(e) Remove the trunnion pins (16).
(f) Install the lubrication inserts (9) with the new AIPC 32-21-16-02-060 PACKINGS (10) and the bushes (8) in the trunnion pins (16).
1 You must install the new packings (10) after each removal of the trunnion pins (16).
(g) Put one of the washers (12), (13), (14) or (15) on each side of the drag strut (7).
(h) Install the trunnion pins (16) assembled with the lubrication inserts (9) and the bushes (8).
(i) Put the two rigging bores horizontally.
(j) Make sure that the grease nipples of the lubrication insert (9) points up.
(k) Align the rigging bores of the trunnion pins (16) and the drag strut (7).
(l) Install the bolts (11), washers (17) and nuts (18).
(m) TORQUE the nuts (18) to between 3 and 2.5 m.daN (22.12 and 18.44 lbf.ft )

.
(n) Safety the nuts (18) with the new AIPC 32-21-16-02-010 COTTER PIN (19).
1 Make sure the heads of the bolt (11) is in rear side of the aircraft.
(o) Align the rigging bores of the NLG leg and the drag strut (7) and install the pin (1) with the J47554 GUIDE CONE.
(p) Remove the J47554 GUIDE CONE.
(q) Install the ring (5).
(r) Align the rigging bores with the pin (1).
(s) Install the bolt (6), washer (2) and nut (3).
(t) TORQUE the nut (3) to between 2 and 1.7 m.daN (14.75 and 12.54 lbf.ft )

.
(u) Safety the nut (3) with the new AIPC 32-21-11-42-050 COTTER PIN (4) or AIPC 32-21-11-62-050 COTTER PIN (4) or AIPC 32-21-11-82-050 COTTER PIN (4).
(3) Install the NLG lockstay assy (Ref. AMM TASK 32-21-17-400-001).
(4) Apply a layer of Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) to zones E.

Subtask 32-21-16-420-053-B ** ON A/C NOT FOR ALL

B. Installation of the NLG Drag-Strut Assy

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 M21931 HOISTING DEVICE on the drag strut (7).
(2) Install the drag strut (7) as follows:
(a) Install the drag strut (7) between the two spherical bearings with the HOIST 500 KG (1100 LB) and the attach bar of the 98D32203500000 TOOL-R I NLG.
(b) Engage the trunnion pins (16) (do not engage them fully) in the spherical bearings and put the drag strut (7) against one of the bearings.
(c) On the opposite side, measure the clearance between the spherical bearing and the drag strut (7).
(d) Make a selection of two washers from the list that follows to get a clearance of between 0.2 mm (0.0079 in.) and 0.5 mm (0.0197 in.):

Subtask 32-21-16-820-056-A

C. Adjustment of the Attachment Roller Positions

NOTE: If you are installing an NLG Drag-Strut Assy which you have previously removed from the same aircraft, and if you haven't adjusted the roller assembly since removal; go straight to the next paragraph of clearance verifications.

(1) Make sure that the 98D32203502000 SAFETY PIN - NLG DOOR and the 460005835 SLEEVE - GROUND LOCK are in position.
(2) Check dimension K. As minimum, it is mandatory that shim (35) remains in place. If you have record of dimension K from the previously installed Drag-Strut, adjust the number of shims to match value K.

NOTE: It is mandatory that shim (35) always remains in place, otherwise damage to the Lockstay pin will occur when tightening bolt (31).

(3) If available, adjust the new lockstay assy with the recorded K dimension:
(a) Remove the cotter pin (23), nut (24) and washer (25).
(b) Remove the pin (33) and washer (34).
(c) Remove the roller (28) and washers (27) and (32).
(d) Removal of the lockwire

1 If necessary:
2 Cut and discard the lockwire from the bolt (31).
3 Release the tabs of the lock plate (30).
(e) Remove the bolt (31), lock plate (30) and washer (29).
(f) Remove the fork end (26) and the shim (35).
(4) Make a selection between the AIPC 32-21-16-03-170 SHIM (36), AIPC 32-21-16-03-180 SHIM (37), AIPC 32-21-16-03-190 SHIM (38), AIPC 32-21-16-03-200 SHIM (39) and AIPC 32-21-16-03-210 SHIM (40) to adjust clearance K.
(a) Apply Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) on the shims you selected and install them on the support (41).
(b) Make sure that the stud (22) is installed.
(c) Install the shim (35) and the fork end (26) on the other shims, note that you must retain shim (35).
(d) Apply a thin layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the thread and smooth parts of the shank of the bolt (31). This includes under the head of the bolt and the fillet.
(e) Install the washer (29), lock plate (30) and bolt (31).
(f) TORQUE the bolt (31) to between 2.56 and 2.16 m.daN (18.88 and 15.93 lbf.ft )

.
(5) Perform an adjustment of the retaining plate (20).

NOTE: The previously recorded locating mark reading should be used to perform the adjustment. If it is not available, centrally locate the adjustment screw.

(a) Remove the cotter pin (47).
(b) Loosen the nut (48).
(c) Removal of the lockwire

1 If necessary:
2 Cut and discard the lockwire from the nuts (43).
(d) Position with nuts (43) the adjusting screw (42) to obtain the correct alignment of the locating groove (45) with locating mark (46).
(e) TORQUE the nut (48) to between 0.75 and 0.6 m.daN (66.37 and 53.10 lbf.in )

and safety it with the new AIPC 32-21-16-02-010 COTTER PIN (47).
(f) TORQUE the nut (43) to between 0.6 and 0.5 m.daN (53.10 and 44.25 lbf.in )

and safety with the lockwire.
(6) Adjustment of the roller position

NOTE: Number of adjustment washers (27) and (32) recorded during the removal of the NLG Drag-Strut Assy should be used to do the adjustment of the roller position. If not available, centrally locate the roller.

(a) Position on the fork end (26) the roller (28) with the number of adjustment washers (27) and (32) on the right side and the left side to obtain the same assembly as recorded during the removal of the NLG Drag-Strut Assy.

NOTE: A total of twenty washers must be installed.

(b) Install the pin (33) with the washer (34) on the fork end (26).
(c) Install the washer (25) and the nut (24) on the pin (33).
(d) TORQUE the nut (24) to between 2 and 1.7 m.daN (14.75 and 12.54 lbf.ft )

and and safety it with the new AIPC 32-21-16-02-010 COTTER PIN (23) cotter pin (23).

Subtask 32-21-16-820-057-A

D. Clearances verifications
(1) Retract the landing gear (Ref. AMM TASK 32-30-00-867-001).
(2) On the left side, remove the cotter pins (51) and (59).
(3) Remove the nuts (52) and (58) and washers (53) and (57).
(4) Remove the bolts (49) and (55) and rod (54).
(5) Remove the 98D32203502000 SAFETY PIN - NLG DOOR from the left door (60).
(6) Close the left door (60) manually and put it against the front stop (61).
(7) Measure and record clearance J3.

Functional gaps

(8) Release the left door (60) and install the 98D32203502000 SAFETY PIN - NLG DOOR.
(9) Measure clearance J4 and record it.
(10) Measure clearance J1 and record it.
(11) Measure clearance J2 and record it.
(12) Extend the landing gear (Ref. AMM TASK 32-30-00-867-002).
(13) Remove the cotter pin (23), nut (24) and washer (25).
(14) Remove the pin (33) and washer (34).
(15) Remove the roller (28) and washers (27) and (32).
(16) Adjustment of J4 and J3 (if required).
(a) Removal of the lockwire

1 If necessary:

Cut and discard the lockwire from the bolt (31).
Release the tabs of the lock plate (30).

(b) Remove the bolt (31), lock plate (30) and washer (29).
(c) Remove the fork end (26) and the shim (35).
(d) Make a selection between the AIPC 32-21-16-03-170 SHIM (36), AIPC 32-21-16-03-180 SHIM (37), AIPC 32-21-16-03-190 SHIM (38), AIPC 32-21-16-03-200 SHIM (39) and AIPC 32-21-16-03-210 SHIM (40) to adjust clearance K and get clearance J3 = 20 mm (0.79 in.) and clearance J4 = 74 mm (2.91 in.) min.
(e) Apply Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) on the shims you selected and install them on the support (41).
(f) Make sure that the stud (22) is installed.
(g) Install the shim (35) on the fork end (26).
(h) Install the fork end (26) and the serrated plate (35) on the shim (36).
(i) Apply a thin layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the thread and smooth parts of the shank of the bolt (31).
(j) Install the washer (29), AIPC 32-21-16-03-120 LOCK PLATE (30) and bolt (31).
(k) TORQUE the bolt (31) to between 2.56 and 2.16 m.daN (18.88 and 15.93 lbf.ft )

.
(17) Adjustment of Clearance J1 (if required).
(a) Put the washers (27) and (32) in position. Place washers on either side of the roller to achieve J1 clearance (20 washers always must be installed).
(b) Put the roller (28) in position.
(c) Install the washers (25) and (34).
(d) Install the pin (33).
(e) Install the nut (24).
(f) TORQUE the nut (24) to between 2 and 1.7 m.daN (14.75 and 12.54 lbf.ft )

.
(18) Adjustment of Clearance J2 (if required).
(a) Adjustment of the retaining plate (20).

NOTE: You must rotate the retaining plate (20) on the drag strut assembly to get the J2 adjustment.

1 Remove the cotter pin (47).
2 Loosen the nut (48).
3 Removal of the lockwire

a If necessary:
b Cut and discard the lockwire from the nuts (43).
4 Position with nuts (43) the adjusting screw (42) to obtain the correct alignment of the locating groove (45) with locating mark (46).
5 TORQUE the nut (48) to between 0.75 and 0.6 m.daN (66.37 and 53.10 lbf.in )

and safety with the new AIPC 32-21-16-02-010 COTTER PIN (47).
6 TORQUE the nut (43) to between 0.6 and 0.5 m.daN (53.10 and 44.25 lbf.in )

and safety with the lockwire.
(19) Retract the landing gear (Ref. AMM TASK 32-30-00-867-001).
(20) Measure clearances J1, J2, J3 and J4 and make sure that they are in the limits.
(21) If the clearances are not in the limits, do the adjustment again.
(22) Extend the landing gear (Ref. AMM TASK 32-30-00-867-002).
(23) Safety the bolt (31) with the tabs of the lock plate (30) and with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(24) Safety the nut (24) with the new AIPC 32-21-16-03-010 COTTER PIN (23).
(25) Install the rod (54), the bush (50) and the bolt (49).
(26) Install the washer (53) and nut (52).
(27) TORQUE the nut (52) to between 0.61 and 0.6 m.daN (53.98 and 53.10 lbf.in )

and safety with the new AIPC 32-21-16-02-010 COTTER PIN (51).
(28) Install the rod (54), the bush (56) and the bolt (55).
(29) Install the washer (57) and the nut (58).
(30) TORQUE the nut (58) to between 0.61 and 0.6 m.daN (53.98 and 53.10 lbf.in )

and safety it with the new AIPC 32-21-16-02-010 COTTER PIN (59).

Subtask 32-21-16-865-064-A

E. 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
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY	4GG	M36
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/CTL	3GG	M35
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/CTL	1GG	M34
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY	2GG	M33
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34

Subtask 32-21-16-869-059-A

F. After you close the LGCIU circuit breakers, put the aircraft back to the correct (ground) configuration (Ref. AMM TASK 32-00-00-860-002).

Subtask 32-21-16-941-060-A

G. Preparation for the Test
(1) Lubricate the NLG (Ref. AMM TASK 12-22-32-640-002).
(2) Remove the safety barriers.
(3) Close the doors of the NLG (Ref. AMM TASK 32-22-00-410-001).

Subtask 32-21-16-720-053-A

H. Functional Test
(1) Do an operational test of the extension and retraction of the landing gear (Ref. AMM TASK 32-31-00-720-003).

5. Close-up
Subtask 32-21-16-860-055-A

A. Put the aircraft back to its initial configuration.
(1) Lower the aircraft with the jacks (Ref. AMM TASK 07-11-00-586-001).
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Make sure that the work area is clean and clear of tools and other items.

[Rev.10 from 2021] 2026.04.02 06:21:22 UTC