W DOC AIRBUS | TSM A320F

Disagree between the ECAM System Display Page Indication and the Closed and Locked Position of the Aft Avionics-Compartment-Door

TASK 52-41-00-810-804-A
Disagree between the ECAM System Display Page Indication and the Closed and Locked Position of the Aft Avionics-Compartment-Door

1. Possible Causes
  • wiring
  • PROX SW-FRAME, AFT AVIONICS COMPT DOOR [40WV]
  • SDAC-1 [1WV1]
  • SDAC-2 [1WV2]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 24-41-00-861-002
Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002
De-energize the Aircraft Electrical Circuits Supplied from the External Power
ASM 315405
AMM 31-55-34-000-001
Removal of the SDAC
AMM 31-55-34-400-001
Installation of the SDAC
AMM 31-60-00-860-001
EIS Start Procedure
AMM 52-41-00-010-002
Open the Avionics Compartment Doors for Access
AMM 52-41-00-410-002
Close the Avionics Compartment Doors after Access
AMM 52-71-00-820-008
Adjustment of the Proximity Switches of the Avionics Compartment Doors 811, 812 and 824
AMM 52-71-14-000-001
Removal of the Proximity Switches of the Avionics Compartment Doors
AMM 52-71-14-400-001
Installation of the Proximity Switches of the Avionics Compartment Doors
3. Fault Confirmation
Subtask 52-41-00-860-056-A
A. Job Set-Up
   (1) Aircraft Maintenance Configuration
     (a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
     (b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
Subtask 52-41-00-710-056-A
B. Test
   (1) On the ECAM control panel:
  • push the DOOR key to get the DOOR/OXY page.
   (2) Make sure that the Aft AVIONIC indication and the door symbol come into view amber.
4. Fault Isolation
Subtask 52-41-00-810-053-A
A. If the test confirms the fault:
   (1) If there is no 28VDC:
  • repair the wiring as necessary.
   (2) If there is 28VDC:
  • disconnect the connector of the door frame proximity switch (40WV)
  • install the jumper wire between the pins B and C of the door frame proximity switch (40WV) ASM 315405
  • do the test given in Para 3.B.
     (a) If the test confirms the fault:
  • do a check for a ground signal at pin C of the door frame proximity switch (40WV) ASM 315405.
       1 If there is no ground signal:
  • repair the wiring from the pin C of the door frame proximity switch (40WV) to the ground terminal.
       2 If there is a ground signal:
  • do a check and repair the wiring from the door frame proximity switch (40WV) to the SDAC-1(2) (1WV1(2)) pin B to pin AD/12E ASM 315405.
     (b) If the test does not confirm the fault:
  • remove the jumper wire between the pins B and C of the door frame proximity switch (40WV)
  • connect the connector of the door frame proximity switch (40WV)
  • adjust the door frame proximity switch (40WV) with the doors checking tool AMM 52-71-00-820-008 or with the ECAM system AMM 52-71-00-820-008.
       1 If the fault continues:
   (3) If the fault continues:
   (4) If the fault continues:
Subtask 52-41-00-710-057-A
B. Test
   (1) On the ECAM control panel:
  • push the DOOR key to get the DOOR/OXY page.
   (2) Make sure that the aft AVIONIC indication and the door symbol come into view green.
5. Close-up
Subtask 52-41-00-860-057-A
A. Put the aircraft back to its initial configuration.
   (1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
   (2) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.
[Rev.8 from Aug 2018] 2026.04.04 04:34:54 UTC
"WTRUIB" 2025