TASK 33-49-00-810-803

 Failure of the Integral Wing and Engine Scan Lighting
 1. Possible Causes
_______________
 - SW-EXT LT/WING (2LX)
 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
 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 two wing and engine scan lights do not operate correctly:
 - replace the SW-EXT LT/WING (2LX) (Ref. IPC 334908).
 B. Do the test given in Para. 3.

 CABIN EMERGENCY LIGHTING - FAULT ISOLATION PROCEDURES
_____________________________________________________
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,
 TASK 33-51-00-810-801
 EPSU - Emergency Power-Supply Unit Fault
 1. Possible Causes
_______________
 - POWER SUPPLY UNIT-EMERGENCY (10WL)

 - signs and lights

 - wiring

 - POWER SUPPLY UNIT-EMERGENCY (11WL)

 - POWER SUPPLY UNIT-EMERGENCY (12WL)

 - POWER SUPPLY UNIT-EMERGENCY (13WL)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 33-51-00-710-001 Operational Test of Emergency Lights by 'TEST EMER
 LIGHT SYS' Pushbutton AMM 33-51-38-000-001 Removal of the Emergency Power-Supply Unit (EPSU) AMM 33-51-38-400-001 Installation of the Emergency Power-Supply Unit
 (EPSU)
 ASM 33-51/01
 ASM 33-51/02
 ASM 33-51/02
 ASM 33-51/02
 ASM 33-51/04
 ASM 33-51/04
 ASM 33-51/04

 3. Fault Confirmation
__________________
 A. Do the operational test of the emergency lighting system (Ref. AMM TASK 33-51-00-710-001).
 4. Fault Isolation
_______________
R
R A. If the test gives a different maintenance message, do the trouble R shooting procedure related to the maintenance message.
 「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 ∞∞33-51-00∞∞∞∞∞∞∞∞∞∞Page 201
 May 01/05 CES

 B. If the operational test gives the maintenance message:

 (1) EPSU UNIT FWD L:
 - replace the POWER SUPPLY UNIT-EMERGENCY (10WL) (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001).
 (a) If the fault continues:

 - check all connected signs and lights for a short-circuit and replace if necessary (Ref. ASM 33-51/01) and (Ref. ASM 33-51/04),

 - if you find one or more defective signs and lights, replace the POWER SUPPLY UNIT-EMERGENCY (10WL) (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001).

 (b) If the fault continues:

 - do a check for a short to ground and repair the wiring if necessary (Ref. ASM 33-51/01) and (Ref. ASM 33-51/04): from EPSU (10WL) pin E to the connector(s) of the related signs and lights, from EPSU (10WL) pin F to the connector(s) of the related signs and lights, from EPSU (10WL) pin G to the connector(s) of the related signs and lights, from EPSU (10WL) pin N to the connector(s) of the related signs and lights, from EPSU (10WL) pin R to the connector(s) of the related signs and lights, from EPSU (10WL) pin T to the connector(s) of the related signs and lights, from EPSU (10WL) pin -B to the connector(s) of the related signs and lights, from EPSU (10WL) pin -J to the connector(s) of the related signs and lights,

 - if you find a short to ground in the wiring, replace the POWER SUPPLY UNIT-EMERGENCY (10WL) (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001).

 (c) If the fault continues:

 - do a check and repair the wiring if necessary (Ref. ASM 33-51/01): from EPSU (10WL) pin -P to DEU-B (300RH1) pin B/17, from EPSU (10WL) pin X to DEU-B (300RH1) pin B/16, from EPSU (10WL) pin L to GND, from EPSU (10WL) pin M to GND, from EPSU (10WL) pin U to GND, from EPSU (10WL) pin -R to GND, from EPSU (10WL) pin -M to GND.
　
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