Operational Test of the Wheel Well Lighting

TASK 33-37-00-710-001-A
Operational Test of the Wheel Well Lighting

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: 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.

FIN: 10LL ** ON A/C NOT FOR ALL
FIN: 12LL
FIN: 7LL
FIN: 8LL
FIN: 9LL ** ON A/C NOT FOR ALL

1. Reason for the Job
To make sure that the wheel well lighting operates correctly.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)
460005835	2	SLEEVE - GROUND LOCK

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
191MB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
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 29-10-00-863-002-A	Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access

3. Job Set-up
Subtask 33-37-00-861-050-A

A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 33-37-00-865-050-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	LIGHTING/WHL WELL/LTG/DOME	2LL	X08

Subtask 33-37-00-010-050-A

C. Get Access
(1) Open the main gear doors for access (Ref. AMM TASK 32-12-00-010-001).
(2) Depressurize the Green, Yellow and Blue hydraulic systems (Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-002) (Ref. AMM TASK 29-10-00-864-003).
(3) Install the 460005835 SLEEVE - GROUND LOCK on the main-gear door actuator.
(a) FOR [12LL] (SW-LT ON)

(4) Open the access panel 191MB.
(5) Put the WARNING NOTICE(S) in position.

4. Procedure
Subtask 33-37-00-710-050-A ** ON A/C NOT FOR ALL

A. Test of the Wheel Well Lighting
(1) Do this test.

ACTION	RESULT
1.On the electrical combination panel 2025VU: set the control switch 12LL to the ON position.	In the MLG wheel well: the wheel well lights 7LL and 8LL come on. In the hydraulic compartment: the hydraulic compartment lights 9LL and 10LL come on.
set the control switch 12LL to the OFF position.	the hydraulic compartment lights 9LL and 10LL go off. In the MLG wheel well: the wheel well lights 7LL and 8LL go off.

Subtask 33-37-00-710-050-B ** ON A/C NOT FOR ALL

A. Test of the Wheel Well Lighting
(1) Do this test.

ACTION	RESULT
1.On the electrical combination panel 2025VU:	In the MLG wheel well:
set the control switch 12LL to the ON position.	the wheel well lights 7LL and 8LL come on.
set the control switch 12LL to the OFF position.	the wheel well lights 7LL and 8LL go off.

5. Close-up
Subtask 33-37-00-410-050-A

A. Close Access
(1) Remove the 460005835 SLEEVE - GROUND LOCK from the main-gear door actuator (Ref. AMM TASK 32-12-00-410-001).
(2) Pressurize the Yellow hydraulic system to close the main gear doors (Ref. AMM TASK 29-10-00-863-002).
(3) Close the main gear doors (Ref. AMM TASK 32-12-00-410-001).
(4) Close the access panel 191MB.
(5) Remove the WARNING NOTICE(S).
(6) Make sure that the work area is clean and clear of tools and other items.

Subtask 33-37-00-862-050-A

B. De-energize the aircraft electrical circuit (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 00:54:37 UTC