Failure of the Left Runway Turn off Light

TASK 33-43-00-810-802-A
Failure of the Left Runway Turn off Light

1. Possible Causes

LT-RUNWAY TURNOFF, L [3LC1]
Lamp
Halogen Bulb
wiring
RELAY-PWR SPLY, RWY TURN OFF LT (6LC)
C/B-LIGHTING/EXT LT/RWY TURN OFF/L [1LC1]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 24-00-00-810-803-A	Circuit Breaker Tripped and/or C/B TRIPPED Warning
AMM 33-43-00-710-001	Operational Test of the Runway Turnoff Lights
ASM 334301
AIPC 334308
AMM 33-43-11-000-001	Removal of the Runway Turnoff Light
AMM 33-43-11-400-001	Installation of the Runway Turnoff Light
AMM 33-43-11-960-001	Replacement of the Halogen Bulb of the Runway Turnoff Light
AMM 33-43-11-960-002	Replacement of the Lamp of the Runway Turnoff Light

3. Fault Confirmation
Subtask 33-43-00-710-052-A

A. Test
Do the operational test of the runway turn off lights AMM 33-43-00-710-001.

4. Fault Isolation
Subtask 33-43-00-810-051-A

A. If during the operational test when you set the EXT LT/RWY TURN OFF switch (2LC) to the ON position, the Left runway- turn-off light does not operate correctly:

NOTE: For the GLS LEDs technology, if there are more than two LEDs that do not come on, Airbus does not make sure that sufficient lighting or a minimum of the same as obtained with the sealed beam lights will come on.

Do a check of the left runway-turn-off lighting/external light circuit-breaker (1LC1) status.

(1) If the circuit breaker is closed:

Do a check of continuity between the left runway-turn-off lighting/external light circuit-breaker (1LC1) and pin A/A of the left runway-turn-off light (3LC1).

(a) If there is continuity:

Do a check for 115VAC between pin A/A and pin A/B of the left runway-turn-off light (3LC1).

1 If there is 115VAC:
a For GLS LEDs Light Unit technology:

Replace LT-RUNWAY TURNOFF, L [3LC1] AMM 33-43-11-000-001 and AMM 33-43-11-400-001.

b For ECE Light unit with incandescent lamp technology and Honeywell Light unit with halogen lamp technology:

Remove the Lamp from the left runway-turn-off light (3LC1) AMM 33-43-11-960-002.
Do a check for 28VAC at the lamp socket.
* If there is 28VAC at the lamp socket:
** For ECE Light unit with incandescent lamp technology:
Replace the Lamp of the left runway-turn-off light (3LC1) AMM 33-43-11-960-002.
** For ECE Light unit and Honeywell Light unit with halogen lamp technology:
Replace the Halogen Bulb of the left runway-turn-off light (3LC1) AMM 33-43-11-960-001.

2 If there is no 28VAC at the lamp socket:

Replace LT-RUNWAY TURNOFF, L [3LC1] AMM 33-43-11-000-001 and AMM 33-43-11-400-001.

3 If there is no 115VAC:

Repair the wiring from pin A/B of the left runway-turn-off light (3LC1) to the ground terminal ASM 334301.

(b) If there is no continuity:

Replace RELAY-PWR SPLY, RWY TURN OFF LT (6LC) AIPC 334308.

1 If the fault continues:

Do a check for 115VAC at pin A/B2 of the power supply relay (6LC).

a If there is 115VAC:

Repair the wiring between pin A/B1 of the power supply relay (6LC) and pin A/A of the left runway-turn-off light (3LC1) ASM 334301.

b If there is no 115VAC:

Replace C/B-LIGHTING/EXT LT/RWY TURN OFF/L [1LC1] .
* If the fault continues:
- Repair the wiring between pin A/B2 of the power supply relay (6LC) and the left runway-turn-off lighting/external light circuit-breaker (1LC1) ASM 334301.

(2) If the circuit breaker is open:

Do the procedure (Ref. TSM TASK 24-00-00-810-803).

(a) If the fault continues:

Replace C/B-LIGHTING/EXT LT/RWY TURN OFF/L [1LC1] .

Subtask 33-43-00-710-053-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:31:58 UTC