4LX)
 ASM 33-49/01

 3. Fault Confirmation
__________________
 A. Test Do the operational test of the wing and engine scan lighting (Ref. AMM TASK 33-49-00-710-001).
 4. Fault Isolation
_______________
 A. If, during the operational test, when you set the EXT LT/WING switch (2LX) to ON, the right wing and engine scan light (4LX) does not operate correctly:
 - do a check of the circuit breaker (1LX) status.
 (1) If the circuit breaker is closed:
 - do a check for 115VAC at the switch (2LX) pin 2A.
 (a) If there is 115VAC:
 - replace the LT-WING & ENG SCAN, R (4LX) (Ref. AMM TASK 33-49-11-000-001) and (Ref. AMM TASK 33-49-11-400-001).
 1 If the fault continues:
_
 - do a check for a ground signal at the right wing and engine scan light (4LX).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞33-49-00∞∞∞∞∞∞∞∞∞∞Page 201
 Feb 01/98 CES b If there is a ground signal:

 a_ If there is no ground signal:
 - repair the wiring from the right wing and engine scan
 light (4LX) to the ground terminal (Ref. ASM 33-49/01).

_
 - do a check and repair the wiring from the switch (2LX) pin 2A to the pin A/A of the right wing and engine scan light (4LX) (Ref. ASM 33-49/01).
 (b) If there is no 115VAC:
 - replace the SW EXT LT/WING (2LX) (Ref. IPC 334908). 1 If the fault continues:
_
 - do a check for 115VAC at pin 3 of the circuit breaker (1LX). a If there is no 115VAC:
_
 - replace the C/B-LIGHTING/EXT LT/WING/AND ENG SCAN/R (1LX).
 b If there is 115VAC:
_
 - repair the wiring from the circuit breaker (1LX) to the pin 1A of the switch (2LX).
 B. Do the test given in Para. 3.

 TASK 33-49-00-810-802

 Failure of the Left Wing and Engine Scan Lighting
 1. Possible Causes
_______________
 - LT-WING & ENG SCAN, L (3LX)

 - wiring

 - SW-EXT LT/WING (2LX)

 - C/B-LIGHTING/EXT LT/WING/AND ENG SCAN/L (5LX)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
IPC 334908
 AMM 33-49-00-710-001 Operational Test of the Wing and Engine Scan Lights
 AMM 33-49-11-000-001 Removal of the Wing and Engine Scan Light (3LX, 4LX)
 AMM 33-49-11-400-001 Installation of the Wing and Engine Scan Light (3LX,

 4LX)
 ASM 33-49/01

 3. Fault Confirmation
__________________
 A. Test Do the operational test of the wing and engine scan lighting (Ref. AMM TASK 33-49-00-710-001).
 4. Fault Isolation
_______________
 A. If, during the operational test, when you set the EXT LT/WING switch (2LX) to ON, the left wing and engine scan light (3LX) does not operate correctly:
 - do a check of the circuit breaker (5LX) status.
 (1) If the circuit breaker is closed:
 - do a check for 115VAC at the switch (2LX) pin 2B.
 (a) If there is 115VAC:
 - replace the LT-WING & ENG SCAN, L (3LX) (Ref. AMM TASK 33-49-11-000-001) and (Ref. AMM TASK 33-49-11-400-001).
 1 If the fault continues:
_
 - do a check for a ground signal at the left wing and engine scan light (3LX).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞33-49-00∞∞∞∞∞∞∞∞∞∞Page 203
 Feb 01/98 CES b If there is a ground signal:

 a_ If there is no ground signal:
 - repair the wiring from the left wing and engine scan
 light (3LX) to the ground terminal (Ref. ASM 33-49/01).

_
 - do a check and repair the wiring from the switch (2LX) pin 2B to the pin A/A of the left wing and engine scan light (3LX) (Ref. ASM 33-49/01).
 (b) If there is no 115VAC:
 - replace the SW-EXT LT/WING (2LX) (Ref. IPC 334908). 1 If the fault continues:
_
 - do a check for 115VAC at pin 3 of the circuit breaker (5LX). a If there is no 115VAC:

_

 - replace the C/B-LIGHTING/EXT LT/WING/AND ENG SCAN/L (5LX) b If there is 115VAC:

_
 - repair the wiring from the circuit breaker (5LX) to the pin 1B of the switch (2LX).
　
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