Lavatory Lighting - In all Lavatories the Lavatory Lights do not come on

TASK 33-24-00-810-802-A
Lavatory Lighting - In all Lavatories the Lavatory Lights do not come on

1. Possible Causes

lavatory lighting relay (2LQ)
wiring
FAP [120RH]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 23-73-00-810-913-A	FAP - Light Module - No or wrong function
TSM TASK 23-73-00-810-927-A	FAP - Maintenance Messages
AMM 33-24-00-710-001	Operational Test of the Lavatory Lighting LQ
ASM 332401

3. Fault Confirmation
Subtask 33-24-00-710-051-A

A. Do the operational test of the lavatory lighting AMM 33-24-00-710-001

4. Fault Isolation
Subtask 33-24-00-810-051-A ** ON A/C NOT FOR ALL

A. If the test confirms the fault:
(1) Do a check of the lavatory lighting relay (2LQ) and replace it if necessary.
(2) If the fault continues:
(a) Do a check and repair the wiring between:

The lavatory lighting relay 2LQ connector A/X1 and the Forward Attendant Panel (FAP) 120RH connector A/14
The lavatory lighting relay 2LQ connector A/A1 and the manifold 2749VT connector 7/A
The lavatory lighting relay 2LQ connector A/A2 and the circuit breaker 1LQ
The lavatory lighting relay 2LQ connector A/X2 and GND ASM 332401.

(3) If the fault continues:
(a) Do the trouble shooting procedure for the FAP - Light Module (Ref. TSM TASK 23-73-00-810-913).

Subtask 33-24-00-810-051-B ** ON A/C NOT FOR ALL

A. If the test confirms the fault:
(1) Do a check of the wiring between the circuit breaker 1LQ and the manifold 2749VT connector 7/A.
(2) If the fault continues:
(a) Do the trouble shooting procedure for the FAP [120RH] (Ref. TSM TASK 23-73-00-810-927).

Subtask 33-24-00-710-054-A

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

5. Close-up
Subtask 33-24-00-860-051-A

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:31:55 UTC