Message Name:

ELECTRICAL INTERIOR CABIN DOOR RELEASE SWITCH INOPERATIVE

The Electrical Interior Cabin Door Release Switch does not function. Unable to close the Cabin Pocket Door.

• Cabin Door Switch Panel
• Door Release Switch Panel
• Door Electrical Latch Actuator
• Relay Drive Equipment (RDE) 1
• Relay Drive Equipment (RDE) 2
• Relay (K701)
• Relay (K702)
• DC Power Distribution Equipment (DCPDE) 1
• DC Power Distribution Equipment (DCPDE) 6
• Secondary Power Distribution Assembly (SPDA) 3 (A15)
• Electrical Management System Control-and-Display Unit (EMS CDU) 1 (A94)
• Electrical Management System Control-and-Display Unit (EMS CDU) 2 (A91)
• Pass Signs/Emer Lights Control Panel (AP13)
• Associated Wiring

Advisory Wire/Service Bulletin:

• AW700-44-0626 - VENUE Cabin Management System Intermittent Switch Panel Inoperative

Forum Articles/Infoservice/Newsletter:

• 2018-05-16 - ATA 25 Cabin door annunciation system description

Notice To Operators (NTO): None

Flight Operation Notifications Manual (FONM): None

NOTE: DOOR RELEASE switch power is controlled by the cockpit seat belt switch position. Make sure the switch is select to OFF while performing troubleshooting.

1. How many cabin pocket doors are inoperative?

   1. If all cabin doors are inoperative, go to step 16.
   2. If only one door is inoperative, continue with next step.

2. Are both Door release switches inoperative at the same time (status light off)?

   1. If YES, go to step 6.
   2. If both door release switches status light is lit but the door is still not closing, go to step 18.
   3. If only one of the switches is inoperative, continue with next step.

3. Disconnect the affected switch panel connector. Carry out a 28 VDC voltage check between pins 1 and 9 (see supplemental wiring diagram of Cabin door electric released latch).

   1. If voltage is good, replace the Door release switch panel and do close out.
   2. If voltage is not good, continue with next step.

4. Using WD Cabin door electric released latch, check that all contacts are properly secured in the Terminal Module (TM).

   1. If contacts are not properly secured, rectify as required and do close out.
   2. If the contacts are properly secured into place, continue with next step.

5. Perform wiring checks between the TM and switch panel.

   1. If wiring checks are good, replace the TM and do close out.
   2. If wiring checks are not good, repair defective wiring as required and do close out.

6. Using the Galley Touchscreen Equipment (GTSE), confirm that the associated virtual Circuit Breaker (CB) is set to "ON".

   1. If the CB is not set to "ON", investigate why and set the CB to "ON" if possible and do close out.
   2. If the CB is set to "Locked", go to step 12.
   3. If the CB is set to "Trip" or "Blocked", go to step 13.
   4. If the CB shows an "X", go to step 8.
   5. If the CB is set to "ON", continue with next step.

7. Make sure there is output voltage present at the DCPDE on the current system page.

   1. If output shows 28 VDC, go to step 9.
   2. If output shows 0 V, continue with next step.

8. Swap the DCPDE with another DCPDE, leaving the TSM in place. Did the fault follow the DCPDE?

   1. If YES, replace defective DCPDE and do close out.
   2. If NO, replace TSM and do close out.

9. Using WD Cabin door electric released latch, check that pin A2 of the relay has 28 VDC.

   1. If there is no 28 VDC, go to step 11.
   2. If there is 28 VDC at pin A2, continue with next step.

10. Perform a wiring checks between pin A3 of the relay and pin 1 of the switch panel.

    1. If wiring checks are good, replace the relay and do close out.
    2. If wiring checks are not good, repair defective wiring as required and do close out.

11. Perform wiring checks between pin A2 and associated DCPDE.

    1. If wiring checks are good, go to step 8.
    2. If wiring checks are not good, repair defective wiring as required and do close out.

12. Set the CES maintenance switch to "ON" and unlock the CB. Set the CB to "ON" and do close out.
13. Using WD Cabin door electric released latch, identify and disconnect the DCPDE output connector. Set the CES maintenance switch to "ON" and attempt to reset the CB.

    1. If the CB does not reset, go to step 8.
    2. If the CB resets, continue with next step.

14. Perform a continuity check to ground at the DCPDE connector (aircraft side) to make sure the wiring is not shorted to ground.

    1. If there is continuity, repair defective wiring as required and do close out.
    2. If there is no continuity, continue with next step.

15. Reconnect the DCPDE. Does the CB stay ON?

    1. If the CB trips again, go to step 8.
    2. If the CB stays ON, do close out.

16. Gain access the EMS CDU Signboard Menu. Select PCDA out, Labels 111 and 112. Verify that Built-In Test (BIT) 29 of Label 111 is not set to "0" (seat belt switch to AUTO) and that Built-In Test (BIT) 25 of Label 112 is not set to "0" (seat belt switch "ON").

    1. If one of the bits is set to "0" on only one EMS CDU, replace the defective EMS CDU and do close out.
    2. If one of the bits is set to "0" on both EMS CDU, continue with next step.

17. Disconnect the Pass signs/Emer lights control panel.

    1. If Cabin Pocket door release operation is resumed, replace the Pass signs/Emer lights control panel and do close out.
    2. If Cabin Pocket door release operation is still inoperative, replace SPDA 3 and do close out.

18. Verify that only one or both of the two switches is unable to activate the door release.

    1. If both of the switches do function, go to step 24.
    2. If only one of the two switches functions, continue with next step.

19. Verify that there is a ground at the switch connector (aircraft side) and pin 8.

    1. If ground is not present, repair defective wiring as required and do close out.
    2. If ground is present, continue with next step.

20. Swap the Door release switch with the one that functions.

    1. If system checks are good, replace defective Door release switch and do close out.
    2. If fault remains, continue with next step.

21. Using WD Cabin door electric released latch, make sure that the ground wire contact is properly secured in the Terminal Module.

    1. If wire contact is not properly secured in the TM, rectify as required and do close out.
    2. If wire contact is properly secured in the TM, continue with next step.

22. Perform a wiring check between the TM and the Door release switch.

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

23. Perform a wiring check between the switch connector and the associated RDE.

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, replace the TM and do close out.

24. Perform a continuity check to ground at the associated RDE, connector P3 and pin 43.

    1. Is the ground is not present, repair defective wiring as required and do close out.
    2. If the ground is present, continue with next step.

25. Swap RDE 1 with RDE 2. Is the fault still present?

    1. If NO, replace RDE 1 and do close out.
    2. If YES, continue with next step.

26. Verify the integrity of the fuse on the electric latch actuator power feed line.

    1. If the fuse is burned, replace the fuse and do close out.
    2. If the fuse is good, continue with next step.

27. Access the electric latch actuator. Carry out a 28 VDC voltage check at pin 1 and 3 of the actuator connector (aircraft side).

    1. If 28 VDC is not present, go to step 30.
    2. If 28 VDC is present, continue with next step.

28. Perform a continuity check between the splice contacts A and B.

    1. If there is no continuity, replace the splice and do close out.
    2. If there is continuity, continue with next step.

29. Perform a wiring check between pin 2 of the actuator connector (aircraft side) and the RDE connector P3-10.

    1. If there is continuity, replace the actuator and do close out.
    2. If there is no continuity, repair defective wiring as required and do close out.

30. Perform a continuity check between the splice contacts C and D.

    1. If there is continuity, repair defective wiring between the TM and the actuator and do close out.
    2. If there is no continuity, continue with next step.

31. Replace the splice.
32. Do close out.