DEU-B Inoperative

TASK 26-17-00-810-819-A
DEU-B Inoperative

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 23-73-00-810-827-A	DEU-B - Fault in DEU-B 300RHx with connected systems/devices
AMM 23-73-00-740-005	BITE-Test of the Cabin Intercommunication Data System (CIDS) through the CFDS

3. Fault Confirmation
Subtask 26-17-00-710-080-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 26-17-00-810-106-A ** ON A/C NOT FOR ALL

A. If the test gives a different maintenance message:

Subtask 26-17-00-810-117-A ** ON A/C NOT FOR ALL

B. If the test gives the maintenance message TEST OK, no other maintenance action is necessary.

Subtask 26-17-00-810-118-A ** ON A/C NOT FOR ALL

C. If the test gives the maintenance message DEU-B(FIN):

do the trouble shooting procedure (Ref. TSM TASK 23-73-00-810-827) for the related DEU-B (300RHx)

Subtask 26-17-00-710-086-A ** ON A/C NOT FOR ALL

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

5. Close-up
Subtask 26-17-00-860-065-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:27:22 UTC