W DOC AIRBUS | TSM A320F

The OFF Legend of the GPWS/FLAP MODE Pushbutton Switch does not come on

TASK 34-48-00-810-823-A
The OFF Legend of the GPWS/FLAP MODE Pushbutton Switch does not come on

1. Possible Causes
  • wiring of the GPWS/FLAP MODE pushbutton switch (7WZ)
  • P/BSW-GPWS/FLAP MODE [7WZ]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
ESPM 2045110
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 344801
3. Fault Confirmation
Subtask 34-48-00-860-057-A
A. Job Set-Up
   (1) Aircraft Maintenance Configuration
     (a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002
Subtask 34-48-00-865-053-A
B. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
122VULIGHTING/ANN LT SPLY/XFMR/BUS 126LPX04
Subtask 34-48-00-710-068-A
C. Test
On the GPWS section of panel 21VU, push the GPWS/FLAP MODE pushbutton switch and make sure that the OFF legend comes on.
4. Fault Isolation
Subtask 34-48-00-810-075-A
A. If the OFF legend of the GPWS/FLAP MODE pushbutton switch stays off:
  • on the panel 25VU, set the INT LT/ANN LT switch to TEST and do a check to see if the OFF legend comes on:
   (1) If the OFF legend comes on:
  • do a check and repair the wiring of the GPWS/FLAP MODE pushbutton switch (7WZ) from pin A/A1 to the ground point ASM 344801.
   (2) If the OFF legend does not come on:
     (a) If the fault continues:
  • do a check and repair the wiring of the GPWS/FLAP MODE pushbutton switch (7WZ) from pin A/4 to pin A/A3 ASM 344801.
Subtask 34-48-00-710-069-A
B. Do the test given in Para. 3.C.
5. Close-up
Subtask 34-48-00-860-058-A
A. Put the aircraft back to its initial configuration.
   (1) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.
[Rev.8 from Aug 2018] 2026.04.04 04:33:16 UTC
"WTRUIB" 2025