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_______ R WARNING : WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST
_______
R EQUIPMENT THAT IS APPROVED (REFER TO INTERNATIONAL OR NATIONAL
R SPECIFICATIONS FOR INTRINSICALLY SAFE TEST EQUIPMENT, E.G. EN50-020,
R UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE
R FIRE OR AN EXPLOSION. _______________
1. Possible Causes
R
 - VALVE-FUEL CROSSFEED (10QM) R - ACTUATOR-FUEL CROSSFEED VALVE (5QE) R - P/BSW-FUEL/X FEED (4QE) R - aircraft wiring
 2. Job Set-up Information
______________________
R A. Fixtures, Tools, Test and Support Equipment
R -------------------------------------------------------------------------------
R REFERENCE QTY DESIGNATION R -------------------------------------------------------------------------------R No specific multimeter
R B. Referenced Information -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R 28-23-00-810-802
R
R 28-23-00-810-804
R
R ESPM 20-00-00
R AMM 28-23-00-720-001
R AMM 28-23-41-000-001 AMM 28-23-41-400-001 AMM 28-23-51-000-001 AMM 28-23-51-400-001
R ASM 28-23/01
Fuel-Crossfeed Valve P/BSW-4QE, ON and/or OPEN
legends do not come on
Fuel-Crossfeed Valve status is not available or is
shown incorrectly on the ECAM FUEL page

Operational Test of Crossfeed Valve Using Individual
Motors: ...
Removal of the Fuel Crossfeed Valve (10QM)
Installation of the Fuel Crossfeed Valve (10QM)
Removal of the Crossfeed Valve Actuator 5QE
Installation of the Crossfeed Valve Actuator 5QE

「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 ∞∞28-23-00∞∞∞∞∞∞∞∞∞∞Page 201
 Nov 01/03 CES

 3. Fault Confirmation
__________________

R A. Table of the circuit breakers referred to in this procedure:
R -------------------------------------------------------------------------------R PANEL DESIGNATION IDENT. LOCATION R -------------------------------------------------------------------------------
R  49VU FUEL/X FEED/VALVE/MOT1  2QE  A12 
R  121VU FUEL/X FEED/VALVE/MOT2  1QE  M24 
R  B. Test 

R (1) Do the procedure for the Operational Test of the Crossfeed Valve R Using Individual Motors (Ref. AMM TASK 28-23-00-720-001).
R NOTE : During the operational test when the C/B-2QE is set to open,
____ R the OPEN legend of the P/BSW-4QE will not come on. This is R because the C/B-2QE also supplies 28VDC to the related lamp R control circuit in the BOARD-ANN LT TEST & INTFC (6LP).
R (2) If, during the test of the crossfeed system:
R
R - the ON and/or the OPEN legends of the P/BSW-4QE do not come on, do
R the procedure (Ref. TASK 28-23-00-810-802)
R
R - the crossfeed valve status (colored position indication) is shown
R XX or is not shown correctly on the ECAM, FUEL system display page,
R do the procedure (Ref. TASK 28-23-00-810-804)
R
R - the crossfeed valve (10QM) does not open and/or close, do Para.
R 4.A.

 4. Fault Isolation
_______________
R A. Procedure
R (1) Remove the actuator, crossfeed valve (5QE) (Ref. AMM TASK 28-23-51-000-001).
R (2) Do a check of the crossfeed valve (10QM) as follows:

R (a) Make sure that the drive spindle of the valve can turn freely:
R - through the 90 degrees between the closed and open position
R - through the 90 degrees between the open and closed position.

R (3) If the drive spindle:
R
R - does not turn freely, do step (4)
R
R - turns freely, do step (5).
R

 「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 ∞∞28-23-00∞∞∞∞∞∞∞∞∞∞Page 202
 Nov 01/03 CESR (4) Replace the VALVE-FUEL CROSSFEED (10QM) (Ref. AMM TASK 28-23-41-000-R 001) and (Ref. AMM TASK 28-23-41-400-001).

 

R (a) If the fault continues, do step (5).
R (5) Make sure that the P/BSW-4QE, C/B-1QE and C/B-2QE are still set to R the conditions that showed the fault in Para. 3.B. If necessary, R reset the conditions.
R (6) Use a multimeter to do a test for 28VDC between a ground point with R easy access and the actuator (5QE) test point (connector and pin) as R shown in the table that follows.
R -----------------------------------------------------R | MOTOR UNDER TEST | FAULT | TEST POINT | R |------------------|----------------|-----------------|
　
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