Installation of NLG Electrical Harness 1M (EV NLG)

TASK 32-21-43-400-002-A-01
Installation of NLG Electrical Harness 1M (EV NLG)

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	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
116	BRAID	AIPC 32-21-43-31-160

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 32-69-00-740-001-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 1M (with no Tire Pressure Indicating System (TPIS))

3. Job Set-up
Subtask 32-21-43-860-060-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 center pedestal, on right center-instrument-panel 400VU, to tell persons not to operate the landing gear control-lever.
On the Nose Wheel Steering (N/WS) 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 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 32-21-43-865-072-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/TO	3LR	W07
122VU	LIGHTING/EXT LT/RWY TURN OFF/L	1LC1	W06

Subtask 32-21-43-869-068-A

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

4. Procedure
Subtask 32-21-43-420-055-A

A. Installation of Upper Harness 1M

WARNING: FOR SAFETY STAND AFT OF THE GEAR LEG WHEN YOU OPERATE THE GROUND OPENING CONTROL OF THE DOOR. CAREFULLY READ THE PLACARD ON THE LEG DOOR BEFORE YOU OPEN THE NOSE GEAR DOORS.

(1) Remove the CAP - BLANKING from the electrical connectors immediately 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 upper harness 1M (117) in position and:
(a) Put the clamp (4) in position on the bracket (10). Then, install the washers (3), screws (2), washers (5), nuts (6) and tighten the nuts (6).
(b) Connect the electrical connector (1300VCA) (1) to the connector on aircraft interface (1300VC).
(c) Safety the grommet (115) with the AIPC 32-21-43-31-160 BRAID (116).
(d) Install the clamp (14), washers (15) and screw (16) on the bracket (13).
(e) Install the clamp (18), screw (17), washer (11) and nut (12) on the bracket (19) and tighten the nut (12).
(f) Install the clamp (43), screw (42), clamp (44), washer (45) and nut (46) on the bracket (47) and tighten the nut (46).
(g) Connect the electrical connector (18GAA) (41) to the system 1 NLG downlock-proximity-sensor (18GA) on the bracket (40).
(h) Install the strut (32), clamp (31), screw (30), clamp (38), washer (37) and nut (36) on the bracket (39) and tighten the nut (36).
(i) Install the clamp (33), washer (34) and screw (35) on the bracket (39).
(j) Put the transition box (27) in position on the bracket (29). Then, install the screws (28) and (26), washer (25), nuts (24) and (20) and tighten the nuts (24) and (20).
(k) Install the clamp (53), washer (54) and screw (55) on the bracket (51).
(l) Connect the electrical connector (7LRA) (50) to the connector on take off light (7LR) (52).
(m) Install the screw (23), clamp (21) and nut (22) on the bracket (29) and tighten the nut (22).
(n) Connect the electrical connector (3GCA) (61) to control-channel nose-wheel-steering feedback-sensor (3GC) (60).
(o) Put the transition box (67) in position on the bracket (62). Then, install the washers (68) and (64), screws (69) and (63), washer (66) and nut (65) and tighten the nut (65).
(p) Connect the electrical connector (3LC1A) (70) to left runway-turnoff-light (3LC1) (71).
(q) Install the clamp (74), washer (73) and screw (72) on the bracket (75).
(r) Connect the electrical connector (24GAA) (76) to system 1 NLG external-proximity-sensor (24GA) (77).

Subtask 32-21-43-865-073-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/TO	3LR	W07
122VU	LIGHTING/EXT LT/RWY TURN OFF/L	1LC1	W06

Subtask 32-21-43-869-069-A

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

Subtask 32-21-43-410-054-A

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

Subtask 32-21-43-710-063-A

E. Test(s)
(1) Do the operational test of the taxi and take off lights (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 BITE check of the landing gear (Ref. AMM TASK 32-69-00-740-001).

5. Close-up
Subtask 32-21-43-942-055-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 00:42:43 UTC