FAP - Light Module - No or wrong function

TASK 23-73-00-810-913-A
FAP - Light Module - No or wrong function

1. Possible Causes

Light Module
FAP [120RH]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 23-73-00-740-005	BITE-Test of the Cabin Intercommunication Data System (CIDS) through the CFDS
AMM 23-73-12-000-002	Removal of the Forward Attendant Panel
AMM 23-73-12-000-003	Removal of the Light Module
AMM 23-73-12-400-002	Installation of the Forward Attendant Panel
AMM 23-73-12-400-003	Installation of the Light Module

3. Fault Confirmation
Subtask 23-73-00-710-314-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the CIDS BITE test through the CFDS AMM 23-73-00-740-005.
(2) Push on the FAP 120RH on the Light Modul the related switches to control the effected Light system.

4. Fault Isolation
Subtask 23-73-00-810-644-A ** ON A/C NOT FOR ALL

A. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message.

Subtask 23-73-00-810-645-A ** ON A/C NOT FOR ALL

B. If there is no maintenance message, but one or more function controls are not possible from the Light Module:

replace the Light Module AMM 23-73-12-000-003 and AMM 23-73-12-400-003:

(1) If the fault continues:

replace the FAP [120RH] AMM 23-73-12-000-002 and AMM 23-73-12-400-002.

(2) If the fault continues:

do the trouble shooting of the related light system.

5. Close-up
Subtask 23-73-00-710-315-A ** ON A/C NOT FOR ALL

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

[Rev.8 from Aug 2018] 2026.04.04 04:25:56 UTC