OBRM failure caused by active director

TASK 23-73-00-810-939-A
OBRM failure caused by active director

1. Possible Causes

DIR-CIDS, 1 [101RH]
FAP [120RH]
CIDS OBRM [116RH]

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 23-73-12-000-007	Removal of the Flight Attendant Panel
AMM 23-73-12-400-007	Installation of the Flight Attendant Panel
AMM 23-73-21-000-001	Removal of the On-Board Replaceable Module
AMM 23-73-21-400-001	Installation of the On-Board Replaceable Module
AMM 23-73-34-000-001	Removal of the CIDS Director
AMM 23-73-34-400-001	Installation of the CIDS Director

3. Fault Confirmation
Subtask 23-73-00-710-367-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the CIDS Interface and Power-Up Test via the CFDS AMM 23-73-00-740-005.

4. Fault Isolation
Subtask 23-73-00-810-702-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 23-73-00-810-703-A ** ON A/C NOT FOR ALL

B. If the test confirms the fault:

replace the DIR-CIDS, 1 [101RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001.

(1) If the fault continues:

replace the FAP [120RH] AMM 23-73-12-000-007 and AMM 23-73-12-400-007.

Subtask 23-73-00-810-709-A ** ON A/C NOT FOR ALL

C. If the test gives the maintenance message OBRM/ DIR1 (101RH) and OBRM/ FAP <NAME> (120RH):

replace the CIDS OBRM [116RH] AMM 23-73-21-000-001 and AMM 23-73-21-400-001.

(1) If the fault continues:

replace the FAP [120RH] AMM 23-73-12-000-007 and AMM 23-73-12-400-007.

(a) If the fault continues:

replace the DIR-CIDS, 1 [101RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001:

5. Close-up
Subtask 23-73-00-710-368-A ** ON A/C NOT FOR ALL

A. Do the test given in para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:25:59 UTC