Removal of the MLG Disconnection Box

TASK 32-11-46-000-001-A
Removal of the MLG Disconnection Box

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.

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)
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. 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 32-00-00-860-001-A	Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01	Flight Configuration Precautions without Electrical Power
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 57-51-42-000-001-A	Removal of the Overwing Panel Protection
MLG Disconnection Box ** ON A/C NOT FOR ALL
MLG Disconnection Box ** ON A/C NOT FOR ALL
MLG Disconnection Box ** ON A/C NOT FOR ALL
MLG Disconnection Box ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 32-11-46-941-050-A

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On panel 400VU:

Make sure that the landing-gear control-lever 6GA is in the DOWN position
Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear.

Subtask 32-11-46-869-050-A

B. 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 (Ref. AMM TASK 32-00-00-860-001) before you open the circuit breakers.

Subtask 32-11-46-860-051-A

C. Open circuit breakers:

Subtask 32-11-46-865-050-A

D. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	L/G/Y BRK/PRESS/IND	61GG	C10
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
** ON A/C NOT FOR ALL
49VU	FUEL/XFR VALVE1/WING/R	2QP	A11
49VU	FUEL/XFR VALVE1/WING/L	1QP	A10
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B07
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B06
** ON A/C ALL
49VU	FUEL/X FEED/VALVE/MOT1	2QE	A12
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
49VU	HYD/FIRE VALVE/Y/ENG2	3702GD	C14
49VU	HYD/FIRE VALVE/G/ENG1	1703GK	C13
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
49VU	SDAC/1/SPLY	3WV	F04
** ON A/C NOT FOR ALL
49VU	ABCU &/Y BRK/PRESS IND	61GG	C10
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B02
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B01
** ON A/C NOT FOR ALL
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE2	Q42
** ON A/C NOT FOR ALL
121VU	FUEL/RFL/DFL/SPLY	2QU	L24
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q41
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
121VU	LGCIU/BAT SPLY/SYS2	59GA	R33
121VU	LGCIU/BAT SPLY/SYS1	58GA	R32
** ON A/C ALL
121VU	HYDRAULIC/BRK/TEMP/DET/UNIT	1GW	M37
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/PARK BRK/CTL/STBY	71GG	N37
121VU	HYDRAULIC/PARK BRK/CTL/NORM	70GG	N36
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q42
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/BRK FAN/WHEELS/3 AND 4	2GS	L35
121VU	HYDRAULIC/BRK FAN/WHEELS/1 AND 2	1GS	L32
121VU	HYDRAULIC/BRK/FAN/CTL	3GS	M32
** ON A/C NOT FOR ALL
121VU	FUEL/RFL/DFL/SPLY	2QU	L23
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q41
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q40
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R40
121VU	LGCIU/BAT SPLY/SYS2	59GA	R32
121VU	LGCIU/BAT SPLY/SYS1	58GA	R31
** ON A/C ALL
122VU	LIGHTING/LANDING LT/R/CTL	4LB	T07
122VU	LIGHTING/LANDING LT/R/SPLY	2LB	T06
122VU	LIGHTING/LANDING LT/L/CTL	3LB	T05
122VU	LIGHTING/LANDING LT/L/SPLY	1LB	T04
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23

Subtask 32-11-46-010-050-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) in position adjacent to the applicable MLG, below the zone 730 or 740.
(2) Open the applicable MLG door (Ref. AMM TASK 32-12-00-010-001).
(3) Make sure that the 460005835 SLEEVE - GROUND LOCK is on the applicable MLG door actuator.

Subtask 32-11-46-010-050-B ** ON A/C NOT FOR ALL

4. Procedure
Subtask 32-11-46-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the MLG Disconnection Box
(1) Remove the screws (1) and lower the lid (4) on the lanyards.
(2) Remove the screw (14) and the cleat (15).
(3) Disconnect the electrical connector (3) and remove the cable (13) from the box.
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(5) Remove the screws (5) and (6) and disconnect the bonding straps (10).
(6) Remove the screws (9) and then the four cable clips (11) from the harness.
(7) Remove the electrical receptacle 4027VC (4028VC) from its retaining plate.
(8) Loosen the locknuts on the electrical connections (7), (8) and (12).
(9) Carefully move the harness cable through the slots in the MLG disconnection box (16).
(10) Hold the MLG disconnection box (16) and remove the screws (2).
(11) Remove the MLG disconnection box (16).

Subtask 32-11-46-020-051-B ** ON A/C NOT FOR ALL

A. Removal of the MLG Disconnection Box
(1) Remove the screws (1) and lower the lid (4) on the lanyards.
(2) Remove the screw (14) and the cleat (15).
(3) Disconnect the electrical connector (3) and remove the cable (13) from the box.
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(5) Remove the screws (5) and (6) and disconnect the bonding straps (10).
(6) Remove the screws (9) and then the four cable clips (11) from the harness.
(7) Remove the electrical receptacle 4027VC (4028VC) from its retaining plate.
(8) Remove the electrical receptacle 4031VC (4032VC) from its retaining plate.
(9) Loosen the locknuts on the electrical connections (7), (8) and (12).
(10) Carefully move the harness cable through the slots in the MLG disconnection box (16).
(11) Hold the MLG disconnection box (16) and remove the screws (2).
(12) Remove the MLG disconnection box (16).

Subtask 32-11-46-020-051-C ** ON A/C NOT FOR ALL

A. Removal of the MLG Disconnection Box
(1) Remove the screws (1) and the lid (4).
(2) Remove the screw (14) and the cleat (15).
(3) Disconnect the electrical connector (3) and remove the cable (13) from the box.
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(5) Remove the screws (5) and (6) and disconnect the bonding straps (10).
(6) Remove the screws (9) and then the four cable clips (11) from the harness.
(7) Remove the electrical receptacle 4027VC (4028VC) from its retaining plate.
(8) Loosen the locknuts on the electrical connections (7), (8) and (12).
(9) Carefully move the harness cable through the slots in the MLG disconnection box (16).
(10) Hold the MLG disconnection box (16) and remove the screws (2).
(11) Remove the MLG disconnection box (16).

Subtask 32-11-46-020-051-D ** ON A/C NOT FOR ALL

A. Removal of the MLG Disconnection Box
(1) Remove the screws (1) and the lid (4).
(2) Remove the screw (14) and the cleat (15).
(3) Disconnect the electrical connector (3) and remove the cable (13) from the box.
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(5) Remove the screws (5) and (6) and disconnect the bonding straps (10).
(6) Remove the screws (9) and then the four cable clips (11) from the harness.
(7) Remove the electrical receptacle 4027VC (4028VC) from its retaining plate.
(8) Remove the electrical receptacle 4031VC (4032VC) from its retaining plate.
(9) Loosen the locknuts on the electrical connections (7), (8) and (12).
(10) Carefully move the harness cable through the slots in the MLG disconnection box (16).
(11) Hold the MLG disconnection box (16) and remove the screws (2).
(12) Remove the MLG disconnection box (16).

[Rev.10 from 2021] 2026.04.01 12:30:12 UTC