Crew buzzer starts unwanted in the cockpit

TASK 23-73-00-810-901-A
Crew buzzer starts unwanted in the cockpit

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 23-42-00-810-808-A	Continuous Operation of the Crew Call Buzzer

3. Fault Confirmation
Subtask 23-73-00-710-291-A ** ON A/C NOT FOR ALL

A. Do the CIDS 1 (ACT) DIRECTOR test and the CIDS 2 (PAS) DIRECTOR test through the CFDS.

4. Fault Isolation
Subtask 23-73-00-810-606-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 23-73-00-810-607-A ** ON A/C NOT FOR ALL

B. Maintenance Action

If, during the operational test, the Crew Call Buzzer starts unwanted:
do the trouble shooting of the Crew Call Buzzer
(Ref. TSM TASK 23-42-00-810-808).

Subtask 23-73-00-710-292-A ** ON A/C NOT FOR ALL

C. Do the test as given in Para. 3 A. and check that no spurious activation of the crew buzzer in the cockpit is heard.

[Rev.8 from Aug 2018] 2026.04.04 04:25:55 UTC