Unwanted Display of the CABIN READY Memo

TASK 31-54-00-810-952-A
Unwanted Display of the CABIN READY Memo

1. Possible Causes

SDAC-1 [1WV1]
SDAC-2 [1WV2]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-55-34-000-001	Removal of the SDAC
AMM 31-55-34-400-001	Installation of the SDAC

3. Fault Confirmation
Subtask 31-54-00-740-062-A

A. Not applicable, the fault is evident.

4. Fault Isolation
Subtask 31-54-00-810-200-A

A. If the fault symptom is identified by the crew observation:

Unwanted display of CABIN READY memo

(1) Do a check for a ground signal at the SDAC1 (1WV1) and SDAC2 (1WV2) connectors:

pin AA/5G
pin AD/5C

(a) If there is a ground signal:

repair as necessary.

(b) If there is no ground signal:

1 Replace the SDAC-1 [1WV1] AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
2 If the fault continues:

replace the SDAC-2 [1WV2] AMM 31-55-34-000-001 and AMM 31-55-34-400-001.

Subtask 31-54-00-740-063-A

B. Make sure that the CABIN READY right memo is not shown.

[Rev.8 from Aug 2018] 2026.04.04 04:30:34 UTC