W DOC AIRBUS | TSM A320F

Strobe Lights - None of the Anti-Collision Strobe Lights flash

TASK 33-48-00-810-801-A
Strobe Lights - None of the Anti-Collision Strobe Lights flash

1. Possible Causes
  • wiring
  • PWR SPLY-RELAY 12LV
  • LT-STROBE SW 11LV
  • LGD SIGNAL-RELAY 13LV
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 33-48-00-810-802-A
Strobe Lights - One of the Anti-Collision Strobe Lights does not flash
AMM 33-48-00-710-002
Operational Test of the Anti-Collision/Strobe Lighting
ASM 334801
3. Fault Confirmation
Subtask 33-48-00-710-050-A
A. Do the operational test of the Anti-Collision / Strobe Lighting and confirm that none of the strobe lights flash AMM 33-48-00-710-002.
4. Fault Isolation
Subtask 33-48-00-810-050-A
A. If the test confirms the fault:
  • do a check for 115 VAC at the related PWR SPLY UNIT connector A/1, A/2 and A/3 ASM 334801.
   (1) If there is approx. 115 VAC:
   (2) If there is no 115 VAC:
  • do a check for 115 VAC at the PWR SPLY-RELAY 12LV connector A/A1, A/B1 and A/C1 ASM 334801.
     (a) If there is approx. 115 VAC:
  • do a check and repair the wiring between:
    PWR SPLY-RELAY 12LV conn. A/A1 and related PWR SPLY UNIT conn. A/1,
    PWR SPLY-RELAY 12LV conn. A/B1 and related PWR SPLY UNIT conn. A/2,
    PWR SPLY-RELAY 12LV conn. A/C1 and related PWR SPLY UNIT conn. A/3,
    PWR SPLY-RELAY 12LV conn. A/X1 and LT-STROBE SW 11LV conn. A2,
    PWR SPLY-RELAY 12LV conn. A/X2 and LT-STROBE SW 11LV conn. 1A ASM 334801.
     (b) If there is no 115 VAC:
  • do a check for 115 VAC at the PWR SPLY-RELAY 12LV connectors A/A2, A/B2 and A/C2 ASM 334801.
       1 If there is no 115 VAC:
  • do a check and repair the wiring between:
    CB 10LV conn. A2 and PWR SPLY-RELAY 12LV conn. A/A2,
    CB 10LV conn. B2 and PWR SPLY-RELAY 12LV conn. A/B2,
    CB 10LV conn. C2 and PWR SPLY-RELAY 12LV conn. A/C2,
    CB 10LV conn. C2 and LT-STROBE SW 11LV conn. 1B ASM 334801.
       2 If there is approx. 115 VAC:
  • do a check of the PWR SPLY-RELAY 12LV and replace it if necessary.
       3 If the fault continues:
  • do a check of the LT-STROBE SW 11LV and replace it if necessary.
       4 If the fault continues:
  • do a check of the LGD SIGNAL-RELAY 13LV and replace it if necessary.
   (3) If the fault continues:
  • do a check and repair the wiring between:
    LDG SIGNAL-RELAY 13LV conn. A/A and LT-STROBE SW 11LV conn. 2B,
    LDG SIGNAL-RELAY 13LV conn. A/1 and GND,
    LDG SIGNAL-RELAY 13LV conn. A/Z and GND,
    LDG SIGNAL-RELAY 13LV conn. A/X and LGCIU 2 AA/14A ASM 334801.
Subtask 33-48-00-710-054-A
B. Do the test as given in the Para. 3.A .
5. Close-up
Subtask 33-48-00-860-050-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:32:02 UTC
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