Functional Test of the Avionics-Compartment Lighting

TASK 33-35-00-720-001-A
Functional Test of the Avionics-Compartment Lighting

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

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
811, 812, 822, 824

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 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access

3. Job Set-up
Subtask 33-35-00-861-051-A

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

Subtask 33-35-00-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	LIGHTING/AVNCS COMPT/DOME	1LS	Z07

Subtask 33-35-00-010-050-A

C. Get access to the avionics compartment.
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE at door 811.
(2) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE at door 812.
(3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE at door 822.
(4) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE at door 824.
(5) Open the forward door 811 of the avionics compartment.
(6) Do not open the lateral left door 812 of the avionics compartment.
(7) Do not open the lateral right door 822 of the avionics compartment.
(8) Do not open the aft door 824 of the avionics compartment.

4. Procedure
Subtask 33-35-00-720-050-A

A. Functional Test of the Avionics Compartment Lighting

ACTION	RESULT
1.On the panel 50VU: push the AVIONICS/COMPT LT pushbutton switch.	On the panel 50VU: the ON legend of this pushbutton switch comes on. Look through the door 811: make sure that the dome lights (7LS, 6LS, 8LS, 22LS, 10LS, 9LS) come on in the avionics compartments.
2.On the panel 50VU: push then release the AVIONICS/COMPT/LT pushbutton switch.	Look through the door 811: make sure that the two forward dome-lights (7LS, 6LS) and the lateral right dome-light (8LS) are on in the avionics compartment, make sure that all the other dome lights (22LS, 10LS, 9LS) go off in the avionics compartment. On the panel 50VU: the ON legend of the AVIONICS/COMPT/LT pushbutton switch goes off.
3.Open the aft door 824 of the avionics compartment.	Make sure that: the two aft dome lights (10LS, 9LS) come on in the avionics compartment, the lateral left dome light (22LS) comes on in the avionics compartment.
4.Close the aft door 824 of the avionics compartment (Ref. AMM TASK 52-41-00-410-002).	Look through the door 811. Make sure that: the two aft dome-lights (10LS, 9LS) go off in the avionics compartment, the lateral left dome-light (22LS) goes off in the avionics compartment.
5.Open the lateral left door 812 of the avionics compartment.	Look through the door 812: You must get the same results as in paragraph 3.
6.Close the lateral left door 812 of the avionics compartment.	Look through the door 812: You must get the same results as in paragraph 4.
7.Close the forward door 811 of the avionics compartment, and open again the lateral left door 812 of the avionics compartment.	Make sure that: the two forward dome-lights (7LS, 6LS) go off in the avionics compartment, the lateral right light (8LS) goes off in the avionics compartment is off.
8.Open the right lateral door 822 of the avionics compartment.	Make sure that: the two forward dome-lights (7LS, 6LS) come on in the avionics compartment, the lateral right dome-light (8LS) comes on in the avionics compartment.
9.Close the right lateral door 822 of the avionics compartment.	Look through the access door 812: You must get the same results as in paragraph 7.

5. Close-up
Subtask 33-35-00-410-050-A

A. Close Access
(1) Close the lateral left door 812 of the avionics compartment.
(2) Remove the access platform(s).

Subtask 33-35-00-862-051-A

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

[Rev.10 from 2021] 2026.04.01 08:26:28 UTC