- 0VDC is at pin A.
(2) Open the C/B-FUEL/XFR VALVE 2/WING/R (4QP), M23 at 121VU.
(3) Check with a multimeter, at the electrical supply cable connector (Ref. ASM 28-15/02) to see if:
- 28VDC is at pin A
- 0VDC is at pin B.
(4) Close the C/B-FUEL/XFR VALVE 2/WING/R (4QP), M23 at 121VU.
(5) If the voltages at pins A and B of the connector are correct, (as in
(1) and (3) above), check/replace the ACTUATOR-TRANSFER VALVE, L FWD SPAR (9QP), (Ref. AMM TASK 28-15-51-000-001), and (Ref. AMM TASK 28-15-51-400-001).
(a) While the actuator is removed from the aircraft confirm that the transfer valve drive shaft and valve are free to rotate.
(b) Repair/replace any unserviceable items found in (a).
(6) If no 28VDC is measured at either pins A and B of the electrical supply cable connector, (as in (1) and (3) above).
(a) Check with a multimeter to see if 28VDC is available at:
- terminal A2, RELAY-L WING TK LOW LEVEL CHANNEL B (7QP)
- terminal X1, RELAY-L WING TK LOW LEVEL CHANNEL B (7QP).
(b) If the 28VDC is not available do a wiring check (Ref. ASM 28-15/02) of the aircraft wiring between the RELAY-L WING TK LOW LEVEL CHANNEL B (7QP) and the C/B-FUEL/XFR VALVE 2/WING/L (3QP).
(c) Repair all the unserviceable wiring and connectors.
(d) Check with a multimeter to see if 28VDC is available at:
- terminal A2, RELAY-R WING TK LOW LEVEL CHANNEL A (8QP)
- terminal X1, RELAY-R WING TK LOW LEVEL CHANNEL A (8QP).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-15-00∞∞∞∞∞∞∞∞∞∞Page 269
201-299, 401-499, Aug 01/05 CES
(e) If the 28VDC is not available do a wiring check (Ref. ASM 28-15/02) of the aircraft wiring between the RELAY-R WING TK LOW LEVEL CHANNEL A (8QP) and the C/B-FUEL/XFR VALVE 2/WING/R (4QP).
(f) Repair all the unserviceable wiring and connectors.
(7) Do the test given in Para 3.A.
(8) If the fault continues, check/replace the RELAY-L WING TK LOW LEVEL CHANNEL B (7QP) 103VU.
(9) Do the test given in Para 3.A.
(10) If the fault continues check/replace the RELAY-R WING TK LOW LEVEL CHANNEL A (8QP) 103VU.
(11) Do the test given in Para 3.A.
(12) If the fault continues do a wiring check (Ref. ASM 28-15/02) of the aircraft wiring:
- between the pin A, ACTUATOR-TRANSFER VALVE, L FWD SPAR (9QP) and the terminal A3, RELAY-L WING TK LOW LEVEL CHANNEL B (7QP)
- between the pin A, ACTUATOR-TRANSFER VALVE, L FWD SPAR (9QP) and the terminal B3, RELAY-R WING TK LOW LEVEL CHANNEL A (8QP)
- between the terminal A1, RELAY-L WING TK LOW LEVEL CHANNEL B (7QP) and the terminal B2, RELAY-R WING TK LOW LEVEL CHANNEL A (8QP)
- between the pin B, ACTUATOR-TRANSFER VALVE, L FWD SPAR (9QP) and the terminalB1, RELAY-R WING TK LOW LEVEL CHANNEL A (8QP).
(13) Repair all the unserviceable wiring and connectors.
(14) Do the test given in Para 3.A.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-15-00∞∞∞∞∞∞∞∞∞∞Page 270
201-299, 401-499, Aug 01/05 CES
TASK 28-15-00-810-819
Intercell XFR System - Left Valve Shows in Transit, CFDS (FUEL) Reports L/REAR
Valve
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
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- ACTUATOR-TRANSFER VALVE, L REAR SPAR (11QP)
- aircraft wiring
- RELAY-L WING TK LOW LEVEL CHANNEL A (5QP) 103VU
- RELAY-R WING TK LOW LEVEL CHANNEL B (6QP) 103VU
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
中國(guó)航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320 Trouble Shooting Manual 排故手冊(cè) FUEL 燃油1(49)
