DOC AIRBUS | TSM A320FFault of the Cockpit Door Lock System -OPEN Lamp stays ON
TASK 52-51-00-810-803-A
Fault of the Cockpit Door Lock System -OPEN Lamp stays ON
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 52-51-00-710-053-A 4. Fault Isolation
Subtask 52-51-00-810-057-A
Subtask 52-51-00-710-054-A
[Rev.8 from Aug 2018]
2026.04.04 04:34:55 UTC
Fault of the Cockpit Door Lock System -OPEN Lamp stays ON
1. Possible Causes
- ELECTRICAL STRIKE-CTR [31MQ]
- CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ]
- ANN LT switch 33LP
- RELAY-TEST DC 61LP
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ASM 331402 | |
| AMM 52-51-00-710-001 | Operational Test of the Routine Access |
| AMM 52-51-00-820-001 | Adjustment of the Cockpit Door, Electrical Release Strikes and Latch Mechanisms |
| ASM 525102 | |
| AMM 52-51-12-000-001 | Removal of the Electrical Release Strike |
| AMM 52-51-12-400-001 | Installation of the Electrical Release Strike |
| AMM 52-51-14-000-001 | Removal of the Control Unit of the Cockpit-Door Locking System |
| AMM 52-51-14-400-001 | Installation of the Control Unit of the Cockpit-Door Locking System |
Subtask 52-51-00-710-053-A 4. Fault Isolation
Subtask 52-51-00-810-057-A
A. If the OPEN lamp of the indication light 22MQ at the COCKPIT DOOR panel 119 VU stays on and the cockpit door is closed and locked:
5. Close-up- do a check for the correct adjustment of the ELECTRICAL STRIKE-CTR [31MQ] AMM 52-51-00-820-001.
- do a check for continuity between the ELECTRICAL STRIKE-CTR [31MQ] cable No.4 and cable No.7.
- replace the ELECTRICAL STRIKE-CTR [31MQ] AMM 52-51-12-000-001 and AMM 52-51-12-400-001.
- do a check for continuity between the ELECTRICAL STRIKE-CTR [31MQ] cable No.7 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] connector A/H ASM 525102.
- do a check and repair the wiring between the ELECTRICAL STRIKE-CTR [31MQ] and the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] ASM 525102.
- make sure that the ANN LT switch 33LP is in BRT position
- do a check for GND signal at:
the RELAY-TEST DC 61LP connector AA ASM 331402
- replace the RELAY-TEST DC 61LP
- replace the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] AMM 52-51-14-000-001 and AMM 52-51-14-400-001.
Subtask 52-51-00-710-054-A
A. Test
(1) Do the test given in Para.3.
(1) Do the test given in Para.3.