「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 : 301-399, ∞∞28-23-00∞∞∞∞∞∞∞∞∞∞Page 219
May 01/04 CES
R **ON A/C ALL
TASK 28-23-00-810-804
Fuel-Crossfeed Valve status is not available or is shown incorrectly on the
ECAM FUEL page
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
WARNING : WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST
_______ EQUIPMENT THAT IS APPROVED (REFER TO INTERNATIONAL OR NATIONAL SPECIFICATIONS FOR INTRINSICALLY SAFE TEST EQUIPMENT, E.G. EN50-020, UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE FIRE OR AN EXPLOSION.
1. Possible Causes
_______________
- ACTUATOR-FUEL CROSSFEED VALVE (5QE)
- aircraft wiring
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific multimeter
B. Referenced Information
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REFERENCE DESIGNATION
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28-23-00-810-801 Fuel-Crossfeed Valve Does Not Open (Close) or Opens (Closes) Slowly 28-23-00-810-802 Fuel-Crossfeed Valve P/BSW-4QE, ON and/or OPEN
legends do not come on CMM 280111 ESPM 20-00-00 AMM 28-23-51-000-001 Removal of the Crossfeed Valve Actuator 5QE AMM 28-23-51-400-001 Installation of the Crossfeed Valve Actuator 5QE AMM 28-23-51-700-001 Test of the Crossfeed Valve Actuator 5QE ASM 28-23/01 TSM 31-00-00
「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 220
May 01/04 CES 3. Fault Confirmation
__________________
A. Test
(1) Do the procedure for the operational test of the crossfeed valve using individual motors (Ref. AMM TASK 28-23-51-700-001).
NOTE : During the operational test when the C/B-2QE is set to open,
____ the OPEN legend of the P/BSW-4QE will not come on. This is because the C/B-2QE also supplies 28VDC to the related lamp control circuit in the BOARD-ANN LT TEST & INTFC (6LP).
(2) If, during the test of the crossfeed system:
- the crossfeed valve (10QM) does not open and/or close, do the procedure (Ref. TASK 28-23-00-810-801)
- the ON and/or the OPEN legends of the P/BSW-4QE do not come on, do the procedure (Ref. TASK 28-23-00-810-802)
- the crossfeed valve status (symbol), relative to the P/BSW-4QE position (command) and the valve (see/feel indicator) position, is not shown correctly on the FUEL page, do the Para. 4.A.
4. Fault Isolation
_______________
A. Procedure
(1) Do a check of the actuator-5QE as follows: NOTE : This step is necessary because although the actuator crossfeed
____ valve 5QE see/feel indicator has moved to the open (closed) position, the internal position indication microswitch OPEN (CLOSED) contacts and/or the related wiring can be unserviceable.
(a) Disconnect the connector 5QE-A from the actuator receptacle R1. NOTE : The text reference to R1 relates to one of the actuator
____ electrical receptacles and is etched onto the gearbox housing.
(b) Monitor the actuator-5QE see/feel indicator and make a record of its position.
(c) With a multimeter, do a continuity check (Ref. ESPM 20-00-00) of the actuator internal position indication microswitches (Ref. ASM 28-23/01) as follows:
「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 221
May 01/04 CES 1 If the actuator see/feel indicator in step (b) was:
_ a In the closed position
_ At the actuator receptacle R1 do a check for:
- continuity between the pins B and E - open circuit between the pins D and E.
b In the open position
_ At the actuator receptacle R1 do a check for: - open circuit between the pins B and E
- continuity between the pins D and E.
NOTE : The multimeter reading for continuity should be less
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