_
 - repair the related wiring. b If there is no short to ground:
_ - replace the circuit breaker 3LR.
 B. Do the test given in Para. 3.

 TASK 33-46-00-810-803

 Failure of the Taxi and Take off Lights
 1. Possible Causes
_______________
 - LGCIU-2 (5GA2)

 - SW-EXT LT/NOSE (4LR)

 - C/B - LIGHTING/EXT LT/TAXI AND TAKE OFF/CTL (2LR)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
IPC 334608
 AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
 AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
 AMM 33-43-00-710-001 Operational Test of the Runway Turnoff Lights
 AMM 33-46-00-710-001 Operational Test of the Taxi and Take Off Lights
 ASM 33-43/01
 ASM 33-46/01

 3. Fault Confirmation
__________________
 A. Test Do the operational test of the taxi and take off lights (Ref. AMM TASK 33-46-00-710-001). Then do the operational test of the runway turn off lights (Ref. AMM TASK 33-43-00-710-001).
 4. Fault Isolation
_______________
 A. If during the operational tests, only the taxi and take off lights do not operate correctly:
 - replace the SW-EXT LT/NOSE (4LR) (Ref. IPC 334608).
 B. If, during the operational tests, the integral lighting of the taxi, take off and runway turn off lights do not operate correctly:
 - do a check of the circuit breaker (2LR) status.
 (1) If the circuit breaker is closed:
 - do a check for a ground signal at the LGCIU2 pin AB/11K.
 (a) If there is no ground signal:
 - replace the LGCIU-2 (5GA2) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
 「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 ∞∞33-46-00∞∞∞∞∞∞∞∞∞∞Page 207
 Feb 01/98 CES

 (b) If there is a ground signal:
 - do a check for 28VDC at the pin 3 of the circuit breaker (2LR).
 1_ If there is no 28VDC:
 - replace the C/B - LIGHTING/EXT LT/TAXI AND TAKE OFF/CTL
 (2LR).

 2 If there is 28VDC:
_
 - do a check of the wiring from the LGCIU2 pin AB/11K to the first terminal block (Ref. ASM 33-46/01).
 a If there is no continuity:
_ - repair the above wiring.
 b If there is continuity:
_
 - repair the wiring from the circuit breaker (2LR) to the first terminal block (Ref. ASM 33-46/01).
 (2) If the circuit breaker is open:
 - close the circuit breaker.
 (a) If the circuit breaker trips:
 - do a check for a short to ground at the wiring between the circuit breaker (2LR) and the LGCIU2 (5GA2) pin AB/11K through the related switches (2LC) and (4LR) and the related power supply relays (6LC), (5LR) and (6LR) (Ref. ASM 33-46/01) and (Ref. ASM 33-43/01).
 1 If there is a short to ground:
_ - repair the related wiring.
 2 If there is no short to ground:
_ - replace the circuit breaker (2LR).
 C. Do the tests given in Para. 3.

 LOGO LIGHTS - FAULT ISOLATION PROCEDURES
________________________________________
 TASK 33-47-00-810-801
 Logo Lights - One Logo Light does not come on
 1. Possible Causes
_______________
 - LOGO LIGHT 3LY

 - BEAM LAMP

 - wiring

 - RELAY 5LY

 - CB 2LY

 - LOGO LIGHT 4LY

 - CB 1LY

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 33-47-00-710-002 Operational Test of the Logo Lights
 AMM 33-47-11-000-001 Removal of the Logo Light 3LY (4LY)
 AMM 33-47-11-400-001 Installation of the Logo Light 3LY (4LY)
 AMM 33-47-11-600-001 Servicing of the Logo Light 3LY (4LY)
 ASM 33-47/01

 3. Fault Confirmation
__________________
 A. Do the operational test of the logo lights (Ref. AMM TASK 33-47-00-710-002).
 4. Fault Isolation
_______________
 A. If the test shows that the LOGO LIGHT 3LY does not come on:
　
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