DOC AIRBUS | TSM A320FContinuous Operation of the Crew Call Buzzer
TASK 23-42-00-810-808-A
Continuous Operation of the Crew Call Buzzer
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 23-42-00-710-064-A 4. Fault Isolation
Subtask 23-42-00-810-058-A
[Rev.8 from Aug 2018]
2026.04.04 04:39:00 UTC
Continuous Operation of the Crew Call Buzzer
1. Possible Causes
- DIR-CIDS, 1 [101RH]
- DIR-CIDS, 2 [102RH]
- FWC-1 [1WW1]
- FWC-2 [1WW2]
- AMU [1RN]
P/B SW-COCKPIT CALL (10WC) - wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 23-42-00-710-001 | Operational Test of the Mechanic Call |
| ASM 234201 | |
| AMM 23-51-34-000-001 | Removal of the Audio Management Unit (AMU) (1RN) |
| AMM 23-51-34-400-001 | Installation of the Audio Management Unit (AMU) (1RN) |
| AMM 23-73-34-000-001 | Removal of the CIDS Director |
| AMM 23-73-34-400-001 | Installation of the CIDS Director |
| AMM 31-53-34-000-001 | Removal of the Flight Warning Computer (FWC) |
| AMM 31-53-34-400-001 | Installation of the Flight Warning Computer (FWC) |
Subtask 23-42-00-710-064-A 4. Fault Isolation
Subtask 23-42-00-810-058-A
A. If, during the operational test, the crew call buzzer operates continuously:
Subtask 23-42-00-710-065-A - replace the DIR-CIDS, 1 [101RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
- replace the DIR-CIDS, 2 [102RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
- replace the FWC-1 [1WW1] AMM 31-53-34-000-001 and AMM 31-53-34-400-001.
- replace the FWC-2 [1WW2] AMM 31-53-34-000-001 and AMM 31-53-34-400-001.
- replace the AMU [1RN] AMM 23-51-34-000-001 and AMM 23-51-34-400-001.
- replace the
P/B SW-COCKPIT CALL (10WC) .
- do a check and repair as necessary the wiring
. between the COCKPIT CALL pushbutton switch (10WC) and the FWCs (1WW1) and (1WW2)
. between the FWCs (1WW1) and (1WW2) and the CIDSs (101RH) and (102RH) ASM 234201.
B. Do the test given in Para. 3.