W DOC AIRBUS | TSM A320F

Impossibility to Lock/Unlock the Forward Passenger/Crew Door when it is Fully Open

TASK 52-11-00-810-822-A
Impossibility to Lock/Unlock the Forward Passenger/Crew Door when it is Fully Open

1. Possible Causes
  • lock unit
  • nylon bushes
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 25-23-46-000-001
Removal of the Door Linings at the FWD Passenger/Crew Doors
AMM 25-23-46-400-001
Installation of the Door Linings at the FWD Passenger/Crew Doors
AMM 52-10-00-010-001
Opening of the Passenger/Crew Door
AMM 52-10-00-100-801
Cleaning of the Passenger/Crew-Doors Gust-Lock Control-Mechanism
AMM 52-10-00-410-001
Closing of the Passenger/Crew Door
AMM 52-10-00-720-001
Functional Test of the Suspension of the Passenger/Crew Door
AMM 52-11-00-820-001
Adjustment of the FWD Passenger/Crew Door
AMM 52-11-12-000-001
Removal of the Door Support Arm, the Door Buffer, the Door Unlocking Handle and the Door Stay Mechanism
AMM 52-11-12-000-802
Removal of the FWD Passenger/Crew-Doors Gust-Lock Control-Mechanism
AMM 52-11-12-400-001
Installation of the Door Support Arm, the Door Buffer, the Door Unlocking Handle and the Door Stay Mechanism
AMM 52-11-12-400-802
Installation of the FWD Passenger/Crew-Doors Gust-Lock Control-Mechanism
F Gust-Lock Control-Mechanism
F Flowchart
3. Fault Confirmation
Subtask 52-11-00-720-059-A
A. Test
   (1) Open the door and locks/unlocks the door in the open position AMM 52-10-00-010-001.
4. Fault Isolation
Subtask 52-11-00-810-071-A
A. If the door cannot be locked or unlocked when it is fully open:
   (1) Remove the linings from the support arm AMM 25-23-46-000-001:
     (a) For the left door: 831GZ and 831FZ
     (b) For the right door: 841GZ and 841FZ
   (2) On the support arm, push and release the pushbutton switch:
   (3) Do a check of the bellcrank position:
     (a) If the bellcrank is in the up position:
  • Do a check of the link between the transfer beam and the secondary rod.
  • Do a rigging check of the door buffer. Refer to the adjustment procedure of the door buffer given in the adjustment of the passenger/crew door AMM 52-11-00-820-001.
     (b) If the bellcrank is in the down position:
  • Do a check of the secondary rod position:
       1 If the secondary rod does not touch the bellcrank:
NOTE: No lubricant or Temporary Protection System (TPS) is permitted on the rods or on the nylon bushes.
       2 If the secondary rod touches the bellcrank:
NOTE: No lubricant or Temporary Protection System (TPS) is permitted on the rods or on the nylon bushes.
  • Make sure that the torque value of the nut that attach the transfer beam to the structure is to 0.72 m.daN (63.72 lbf.in).
   (4) Do a visual check of the lock-unit housing for cracks:
     (a) If there are cracks:
  • Fully open the door AMM 52-10-00-010-001.
  • Make sure that the lock unit locks the door in the open position.
       1 If the door locking is correct:
NOTE: The replacement must be performed before 100 flight cycles.
       2 If the door locking is not correct:
  • Replace the lock unit AMM 52-11-12-000-001 and AMM 52-11-12-400-001.
  • If not, the door is unserviceable until replacement of the lock unit. Refer to the Master Minimum Equipment List (MMEL) for the dispatch conditions.
     (b) If there are no cracks:
  • Fully open the door AMM 52-10-00-010-001.
  • Do this five times to make sure that the lock unit locks the door in the open position.
  • On the support arm, make sure that the load applied on the pushbutton switch to unlock the door is a maximum of 6 daN (13.49 lbf) AMM 52-10-00-720-001.
       1 If the door locking is correct:
  • Go to Para. 5.A.
       2 If the door locking is not correct:
  • Go to Para. 4.A.
Subtask 52-11-00-720-061-A
B. Test
   (1) Open/close the forward passenger/crew door AMM 52-10-00-010-001 and AMM 52-10-00-410-001.
     (a) Make sure that the door operates correctly.
5. Close-up
Subtask 52-11-00-869-050-A
A. Close Access
   (1) Install the linings of the support arm AMM 25-23-46-400-001:
     (a) For the left door: 831GZ and 831FZ
     (b) For the right door: 841GZ and 841FZ.
[Rev.8 from Aug 2018] 2026.04.04 04:34:44 UTC
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