W DOC AIRBUS | TSM A320F

LED anti-collision light - The Lower Anti-Collision Beacon Light does not flash

TASK 33-48-00-810-804-A
LED anti-collision light - The Lower Anti-Collision Beacon Light does not flash

1. Possible Causes
  • ANTI COLLISION LIGHT [6LV]
  • PSU [4LV]
  • PWR SPLY-RELAY (9LV)
  • EXT LT BEACON-SWITCH (2LV)
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 33-48-00-710-001
Operational Test of the Anti-Collision Lighting
ASM 334801
AMM 33-48-12-000-001
Removal of the Lower Beacon/Strobe Light from the Fuselage Outside
AMM 33-48-12-400-001
Installation of the Lower Beacon/Strobe Light from the Fuselage Outside
AMM 33-48-37-000-001
Removal of the Power Supply Unit
AMM 33-48-37-400-001
Installation of the Power Supply Unit
3. Fault Confirmation
Subtask 33-48-00-710-053-A
A. Do the operational test of the Anti-Collision/Strobe Lighting and confirm that the lower anti-collision beacon light does not flash AMM 33-48-00-710-001.
4. Fault Isolation
Subtask 33-48-00-810-053-A ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
   (1) If the fault continues:
  • do a check for 200 VAC at the PWR SPLY UNIT (4LV) connectors A/1, A/2 and A/3 ASM 334801
     (a) If there is approx. 200 VAC:
     (b) If there is no 200 VAC:
  • do a check of the PWR SPLY-RELAY (9LV) and replace it if necessary.
   (2) If the fault continues:
  • do a check of the EXT LT BEACON-SWITCH (2LV) and replace it if necessary.
   (3) If the fault continues:
  • do a check and repair the wiring between:
    CB 5LV conn. A2 to PWR SPLY-RELAY 9LV conn. A/A2,
    CB 5LV conn. B2 to PWR SPLY-RELAY 9LV conn. A/B2,
    CB 5LV conn. C2 to PWR SPLY-RELAY 9LV conn. A/C2,
    CB 5LV conn. A2 to EXT LT BEACON-SWITCH 2LV conn. 1B,

    PWR SPLY-RELAY 9LV conn. A/A1 to PWR SPLY UNIT 4LV conn. A/1,
    PWR SPLY-RELAY 9LV conn. A/B1 to PWR SPLY UNIT 4LV conn. A/2,
    PWR SPLY-RELAY 9LV conn. A/C1 to PWR SPLY UNIT 4LV conn. A/3,
    PWR SPLY-RELAY 9LV conn. A/X1 to EXT LT BEACON-SWITCH 2LV conn. 3B,
    PWR SPLY-RELAY 9LV conn. A/X2 to GND,

    PWR SPLY UNIT 4LV conn. B/A to LIGHT-BEACON LOWER 6LV conn. A/A,
    PWR SPLY UNIT 4LV conn. B/B to LIGHT-BEACON LOWER 6LV conn. A/B,
    PWR SPLY UNIT 4LV conn. B/C to LIGHT-BEACON LOWER 6LV conn. A/C,
    PWR SPLY UNIT 4LV conn. A/12 to GND,
    PWR SPLY UNIT 4LV conn. A/14 to GND ASM 334801.
Subtask 33-48-00-810-053-B ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
   (1) If the fault continues:
  • do a check for 200 VAC at the PWR SPLY UNIT (4LV) connectors A/1, A/2 and A/3 ASM 334801.
     (a) If there is approx. 200 VAC:
     (b) If there is no 200 VAC:
  • do a check of the PWR SPLY-RELAY (9LV) and replace it if necessary.
   (2) If the fault continues:
  • do a check of the EXT LT BEACON-SWITCH (2LV) and replace it if necessary.
   (3) If the fault continues:
  • do a check and repair the wiring between:
    CB 5LV conn. A2 to PWR SPLY-RELAY 9LV conn. A/A2,
    CB 5LV conn. B2 to PWR SPLY-RELAY 9LV conn. A/B2,
    CB 5LV conn. C2 to PWR SPLY-RELAY 9LV conn. A/C2,
    CB 5LV conn. A2 to EXT LT BEACON-SWITCH 2LV conn. 1B,

    PWR SPLY-RELAY 9LV conn. A/A1 to PWR SPLY UNIT 4LV conn. A/1,
    PWR SPLY-RELAY 9LV conn. A/B1 to PWR SPLY UNIT 4LV conn. A/2,
    PWR SPLY-RELAY 9LV conn. A/C1 to PWR SPLY UNIT 4LV conn. A/3,
    PWR SPLY-RELAY 9LV conn. A/X1 to EXT LT BEACON-SWITCH 2LV conn. 3B,
    PWR SPLY-RELAY 9LV conn. A/X2 to GND,

    PWR SPLY UNIT 4LV conn. B/1 to LIGHT-BEACON LOWER 6LV conn. A/1,
    PWR SPLY UNIT 4LV conn. B/2 to LIGHT-BEACON LOWER 6LV conn. A/2,
    PWR SPLY UNIT 4LV conn. B/3 to LIGHT-BEACON LOWER 6LV conn. A/3,
    PWR SPLY UNIT 4LV conn. A/12 to GND,
    PWR SPLY UNIT 4LV conn. A/14 to GND ASM 334801.
Subtask 33-48-00-710-057-A
B. Do the test as given in the Para. 3.A .
5. Close-up
Subtask 33-48-00-860-053-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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