Aux. Lighting - Lavatory Auxiliary Lights do not operate

TASK 33-51-00-810-815-A
Aux. Lighting - Lavatory Auxiliary Lights do not operate

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
ASM 335103
AMM 33-51-14-000-001	Removal of the Auxiliary Lavatory Light
AMM 33-51-14-400-001	Installation of the Auxiliary Lavatory Light

3. Fault Confirmation
Subtask 33-51-00-865-055-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	LIGHTING/EMER LT/CABIN	79WL	H07

Subtask 33-51-00-860-060-A

B. Energize the aircraft electrical circuits
AMM 24-41-00-861-002.

4. Fault Isolation
Subtask 33-51-00-810-064-A

A. Maintenance Action
(1) If one or more LIGHT-LAVARORY, AUX do not come on:

replace the related LIGHT-LAVATORY, AUX AMM 33-51-14-000-001 and AMM 33-51-14-400-001.

(a) If the fault continues:

do a check and repair the wiring between:
CB 79WL and the related LIGHT-LAVATORY, AUX pin 1,
the related LIGHT-LAVATORY, AUX pin 2 and GND ASM 335103.

(2) If all the LIGHTS-LAVATORY, AUX do not come on:

do a check and repair the wiring between:
CB 79WL and the related LIGHT-LAVATORY, AUX pin 1,

(a) If the fault continues:

Subtask 33-51-00-710-078-A

B. Do the test as given in Para. 3.

5. Close-up
Subtask 33-51-00-860-061-A

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:32:08 UTC