W DOC AIRBUS | TSM A320F

Failure of the Aisle Lights (Floor Proximity Emergency Escape Path Marking System) controlled by EPSU 12WL

TASK 33-51-00-810-841-A
Failure of the Aisle Lights (Floor Proximity Emergency Escape Path Marking System) controlled by EPSU 12WL

1. Possible Causes
  • LAMP MODULE (CLEAR) [361WL2]
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 33-51-00-710-001
Operational Test of the Emergency Lights
AMM 33-51-00-710-007
Operational Test of the Emergency Lighting in the Cabin with the 'LIGHT EMER' Pushbutton Switch
ASM 335104
AMM 33-51-19-000-001
Removal of the Seat/Wall-Mounted Emergency Light
AMM 33-51-19-400-001
Installation of the Seat/Wall-Mounted Emergency Light
3. Fault Confirmation
CAUTION: DO NOT USE THE TEACH-IN PROCEDURE AS AN ALTERNATIVE FOR TROUBLESHOOTING. A TEACH-IN PROCEDURE IS NOT A RESET PROCEDURE. BEFORE YOU DO A TEACH-IN PROCEDURE, MAKE SURE THAT YOU CORRECTED ALL FAILURES. IF YOU DO NOT OBEY THIS, FAILURES CAN CAUSE A MALFUNCTION OF THE CABIN EMERGENCY LIGHTING SYSTEM.
Subtask 33-51-00-710-127-A
A. Do the operational test of the emergency lights with the MCDU AMM 33-51-00-710-001.
4. Fault Isolation
Subtask 33-51-00-810-136-A
A. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message.
Subtask 33-51-00-810-137-A
B. If the operational test gives the maintenance message:
   (1) FPEEPMS AISLE LT/EPSU(12WL)EMER R:
     (a) If the fault continues:
  • do a check and repair the wiring between:
    the related lamp module 361WL2 pin 1 and EPSU 12WL pin -J.
    the related lamp module 361WL2 pin 2 and GND ASM 335104.
Subtask 33-51-00-710-128-A
C. Do the test given in Para. 3.
5. Close-up
Subtask 33-51-00-860-097-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:32:10 UTC
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