W DOC AIRBUS | TSM A320F

Fault of the Cockpit Door Lock System - General

TASK 52-51-00-810-801-A
Fault of the Cockpit Door Lock System - General

1. Possible Causes
  • ELECTRICAL STRIKE [30MQ]
  • CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ]
  • WIRING
  • ELECTRICAL STRIKE-CTR [31MQ]
  • ELECTRICAL STRIKE [32MQ]
  • Indication Light 22MQ
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 33-14-00-810-805-A
Failure of the Annunciator-Light Test and Interface-Board
ESPM 2052240
AMM 52-51-00-710-002
Operational Test of the Cockpit-Door Locking System (CDLS)
AMM 52-51-00-820-001
Adjustment of the Cockpit Door, Electrical Release Strikes and Latch Mechanisms
ASM 525101
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
3. Fault Confirmation
Subtask 52-51-00-710-050-A
A. Test
   (1) Do the operational test of the Cockpit Door Lock System AMM 52-51-00-710-002.
4. Fault Isolation
Subtask 52-51-00-810-050-C
A. If the FAULT lamp of the indication light 22MQ at the COCKPIT DOOR panel 119VU and the STRIKE TOP LED at the CKPT CONT panel 20VU are on:
  • manually unlock the cockpit door and open it
  • set the toggle switch 26MQ on the CKPT DOOR panel 119VU to the UNLOCK position
  • wait for a minimum of 10 seconds and set the toggle switch 26MQ to the NORM position.
   (1) If the fault continues:
  • make sure that the clearance "C" between the cockpit door edge and the lavatory wall is between 8.0 mm (0.3150 in.) and 10.0 mm (0.3937 in.)
  • If necessary adjust the clearance "C" between the cockpit door edge and the lavatory wall AMM 52-51-00-820-001.
   (2) If the fault continues:
   (3) If the fault continues:
  • do a check of continuity between ELECTRICAL STRIKE [30MQ] connector 2 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] connector A/T ASM 525101.
     (a) If there is no continuity:
  • repair the WIRING between ELECTRICAL STRIKE [30MQ] connector 2 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] connector A/T.
     (b) If there is continuity:
  • do a check of the insulation ESPM 2052240 and repair the WIRING between ELECTRICAL STRIKE [30MQ] connector 2 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] connector A/T.
   (4) If the fault continues:
Subtask 52-51-00-810-051-C
B. If the FAULT lamp of the indication light 22MQ at the COCKPIT DOOR panel 119VU and the STRIKE MID LED at the CKPT CONT panel 20VU are on:
  • manually unlock the cockpit door and open it.
  • set the toggle switch 26MQ on the CKPT DOOR panel 119VU to the UNLOCK position.
  • wait for minimum 10 seconds and set the toggle switch 26MQ to the NORM position.
   (1) If the fault continues:
   (2) If the fault continues:
   (3) If the fault continues:
  • do a check of continuity between ELECTRICAL STRIKE-CTR [31MQ] connector 2 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] connector A/N ASM 525101.
     (a) If there is no continuity:
  • repair the WIRING between ELECTRICAL STRIKE-CTR [31MQ] connector 2 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] connector A/N
     (b) If there is continuity:
  • do a check of the insulation ESPM 2052240 and repair the WIRING between ELECTRICAL STRIKE-CTR [31MQ] connector 2 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] connector A/N.
   (4) If the fault continues:
Subtask 52-51-00-810-052-C
C. If the FAULT lamp of the indication light 22MQ at the COCKPIT DOOR panel 119VU and the STRIKE BOT LED at the CKPT CONT panel 20VU are on:
  • manually unlock the cockpit door and open it.
  • set the toggle switch 26MQ on the CKPT DOOR panel 119VU to the UNLOCK position.
  • wait for minimum 10 seconds and set the toggle switch 26MQ to the NORM position.
   (1) If the fault continues:
   (2) If the fault continues:
   (3) If the fault continues:
  • do a check of continuity between ELECTRICAL STRIKE [32MQ] connector 2 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] connector A/U ASM 525101.
     (a) If there is no continuity:
  • repair the WIRING between ELECTRICAL STRIKE [32MQ] connector 2 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] connector A/U.
     (b) If there is continuity:
  • do a check of the insulation ESPM 2052240 and repair the WIRING between ELECTRICAL STRIKE [32MQ] connector 2 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM or CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM [24MQ] connector A/U.
   (4) If the fault continues:
Subtask 52-51-00-810-053-A
D. If the FAULT lamp of the indication light 22MQ at the COCKPIT DOOR panel 119VU and the CHAN 1 LED at the CKPT CONT panel 20VU are on:
Subtask 52-51-00-810-054-A
E. If the FAULT lamp of the indication light 22MQ at the COCKPIT DOOR panel 119VU and the CHAN 2 LED at the CKPT CONT panel 20VU are on:
Subtask 52-51-00-810-059-A
F. If the FAULT lamp of the indication light 22MQ at the COCKPIT DOOR panel 119VU, but no other indicator light at the CKPT CONT panel 20VU, is on:
  • make sure that the ANN LT switch 33LP is in BRT position.
   (1) If the fault continues:
  • do a check for a GND signal at:
    the Indication Light 22MQ connector A/4
     (a) If there is a ground signal:
     (b) If there is no ground signal:
  • replace the Indication Light 22MQ .
Subtask 52-51-00-720-050-A
G. Do the test given in para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:34:55 UTC
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