Installation of the NLG Electrical Harness 2M

TASK 32-21-43-400-003-A
Installation of the NLG Electrical Harness 2M

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: 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.

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 2M (6 FT) - ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	1	HOT AIR BLOWER MAX OPERATING 370 DEG C (700 DEG F)
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06LDG2)	Non Hardening Jointing Putty-High Temp. Area - Structure

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
58	HEAT SHRINK SLEEVE	AIPC 32-21-43-42-010
25	BRAID	AIPC 32-21-43-42-030
59	IDENTIFICATION BAND	AIPC 32-21-43-42-040
14	BRAID	AIPC 32-21-43-43-050
10	HEAT-SHRINK SLEEVE	AIPC 32-21-43-43-060

D. 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 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-00-00-481-002-A	Installation of the Safety Devices on the Landing Gear Doors
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 32-22-00-010-001-A	Nose Gear Doors - Ground Doors Opening
TASK 32-22-00-410-001-A	Nose Gear Doors - Ground Doors Closing
TASK 32-51-00-710-001-A	Operational Test of the Nose Wheel Steering with the CFDS
TASK 32-51-00-720-005-A	Functional Test of the Nose-Wheel-Steering Deactivation Electrical-Box
TASK 32-69-00-740-001-A	BITE Check of Landing-Gear Control Interface-Unit (LGCIU) With Use of MCDU to Ensure that Continuous BITE is Operative
TASK 33-43-00-710-001-A	Operational Test of the Runway Turnoff Lights
TASK 33-46-00-710-001-A	Operational Test of the Taxi and Take Off Lights
NLG - Electrical Harness 2M
Nose Wheel Steering - Servo-Control

3. Job Set-up
Subtask 32-21-43-860-057-A

A. Aircraft Maintenance Configuration
(1) Make sure that the safety devices are installed on the landing gears (Ref. AMM TASK 32-00-00-481-001).
(2) Make sure that the WARNING NOTICE(S) is(are) in position:

on the right center instrument-panel 400VU, to tell persons not to operate the landing gear control lever,
on the NWS handwheels and the rudder pedals to tell persons not to operate them.

(3) Make sure that the NLG doors are open (Ref. AMM TASK 32-22-00-010-001).
(4) Make sure that the safety devices are correctly installed on the landing gear doors (Ref. AMM TASK 32-00-00-481-002).
(5) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position adjacent to the NLG.
(6) If the electrical power is not necessary for other maintenance tasks, make sure that the aircraft electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002). Then, it is not necessary to operate the circuit breakers below.

Subtask 32-21-43-865-060-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
122VU	LIGHTING/EXT LT/TAXI AND TAKE OFF/TAXI	1LR	W08
122VU	LIGHTING/EXT LT/RWY TURN OFF/R	1LC2	W05

Subtask 32-21-43-869-065-A

C. Flight Configuration Precautions
(1) If the electrical power is necessary for other maintenance tasks, do the precautions for flight configuration (Ref. AMM TASK 32-00-00-860-001) after you have opened the circuit breakers.

4. Procedure
Subtask 32-21-43-420-053-C

A. Installation of the Upper Harness 2M
(1) Remove the CAP - BLANKING from the electrical connectors before you connect them.
(2) Apply a layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threads of all the nuts and bolts before you install them.
(3) Hold the upper harness 2M (44) in position and:
(a) Connect the electrical connector 1302VCA (55) to the receptacle 1302VC of the housing installed on the aircraft structure.
(b) Put the clamp (52) in position on the bracket (49).
(c) Install the washers (53), screws (54), washers (51) and nuts (50) and tighten them.
(d) Connect the electrical connector 8LRA (30) to the taxi light 8LR (29).
(e) Install the spacer (38), clamp (33), washer (31) and screw (32) on the bracket (37).
(f) Install the clamp (34), washer (35) and screw (36) on the bracket (37).
(g) Connect the electrical connector 19GAA (39) to the proximity sensor 19GA on the bracket (40).
(h) Install the clamp (48), washer (46) and screw (47) on the bracket (45).
(i) Install the clamp (43), washer (42) and screw (41) on the bracket (45).
(j) Make sure that the heat shrink sleeve (58) is not damaged.
1 If it is damaged:

Remove and discard the heat shrink sleeve (58) and the identification band (59).
Install the new AIPC 32-21-43-42-010 HEAT SHRINK SLEEVE (58).
Connect the electrical connector (56) to the nose-wheel-steering servo control 6GC (57).
Heat-shrink the top part of the sleeve (58). Make sure that you do not cause damage to the cover of the 6GCA connector.
Install the new AIPC 32-21-43-42-040 IDENTIFICATION BAND (59).

2 If it is not damaged:

Connect the electrical connector (56) to the nose-wheel-steering servo control 6GC (57).
Fold the end of the heat shrink sleeve (58) back on the connector (56) to fully protect it.

(k) Connect the electrical connector 4GCA (28) to the nose-wheel steering feedback-sensor 4GC (27).
(l) Install the clamp (21), washer (22) and screw (23) on the bracket (24).
(m) Safety the grommet (26) with a new AIPC 32-21-43-42-030 BRAID (25).
(n) Install the clamp (4), washer (6) and screw (7) on the bracket (5).
(o) Install the clamp (3), washer (2) and screw (1) on the bracket (5).
(p) Connect the electrical connector 3LC2A (8) to the right runway-turnoff-light 3LC2 (9).
(q) Make sure that the heat-shrink sleeve (10) is in the correct condition.
1 If the heat-shrink sleeve (10) is not in the correct condition, install a new heat-shrink sleeve as follows:
a Remove and discard the damaged heat-shrink sleeve (10) from the electrical wire.
b Cut a piece of AIPC 32-21-43-43-060 HEAT-SHRINK SLEEVE (10) to a length Y between 137 mm (5.39 in.) and 143 mm (5.63 in.).
c Install the heat-shrink sleeve (10) on the electrical wire at a distance X between 72 mm (2.83 in.) and 78 mm (3.07 in.).
d Use a HOT AIR BLOWER MAX OPERATING 370 DEG C (700 DEG F) to shrink the heat-shrink sleeve (10).
e Make sure that you do not increase the temperature of the heat-shrink sleeve (10) to more than 120 deg.C (248 deg.F).
(r) Connect the electrical connector 5GCA (11) to the electrical box 5GC (12).
(s) Install the clamp (15), washer (16) and screw (17) on the bracket (20).
(t) Safety the grommet (13) with a new AIPC 32-21-43-43-050 BRAID (14).
(u) Connect the electrical connector 25GAA (18) to the NLG proximity sensor 25GA (19).

Subtask 32-21-43-865-061-A

B. 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
122VU	LIGHTING/EXT LT/TAXI AND TAKE OFF/TAXI	1LR	W08
122VU	LIGHTING/EXT LT/RWY TURN OFF/R	1LC2	W05

Subtask 32-21-43-869-061-A

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

Subtask 32-21-43-410-053-A

D. Close Access
(1) Remove the access platform(s).
(2) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).

Subtask 32-21-43-720-051-A

E. Test:
(1) Do the operational test of the taxi and take off light (Ref. AMM TASK 33-46-00-710-001).
(2) Do the operational test of the runway turnoff lights (Ref. AMM TASK 33-43-00-710-001).
(3) Do the operational test of the nose wheel steering (Ref. AMM TASK 32-51-00-710-001).
(4) Do the functional test of the nose wheel steering deactivation electrical box (Ref. AMM TASK 32-51-00-720-005).
(5) Do the BITE test of the landing gear (Ref. AMM TASK 32-69-00-740-001).

5. Close-up
Subtask 32-21-43-942-053-A

A. Removal of Equipment
(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 00:42:46 UTC