- RELAY-L OR R FWD XFR VALVE OPEN LATCH (14QP)
- aircraft wiring
- the suppression diode across terminals X and Z of the RELAY 14QP
2. Job Set-up Information
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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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AMM 28-15-00-710-002 Operational Check of Individual Transfer Valves to Ensure Valve Shaft Rotates Valve to Open Position AMM 28-42-34-000-001 Removal of the Fuel Quantity-Indicating Computer (FQIC) (3QT) AMM 28-42-34-400-001 Installation of the Fuel Quantity-Indicating Computer (FQIC) (3QT) ASM 28-15/02
3. Fault Confirmation
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A. Do the Operational Test of the Intercell Transfer Valves (Ref. AMM TASK 28-15-00-710-002), (9 and 10QP ONLY).
NOTE : The intercell transfer valves (ICTVs) are motor driven and the
____ power for these circuits is derived from the main power. The ICTVs are immobilized on battery power.
「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 237
201-299, 401-499, Aug 01/05 CES
(1) Connect a multimeter to the RELAY-L OR R FWD XFR VALVE OPEN LATCH (14QP) as follows:
- the multimeter negative/low input to terminal Z
- the multimeter positive/high input to terminal X.
(2) Disconnect the lead from terminal 3 of RELAY-L OR R FWD XFR VALVE OPEN LATCH (14QP).
(3) After approximately 5 seconds to allow the valves to move, check that:
(a) The L and R XFR Valves show open on the FUEL System SD Page.
(b) The multimeter reads 28VDC.
(4) Reconnect the lead disconnected in (2) above.
(5) Check that:
(a) The L and R XFR Valves remain at open on the FUEL System SD Page.
(b) The multimeter reads 28VDC.
(6) Open C/Bs (3QP), M22 and (4QP), M23 at 121VU
(7) Close C/Bs (3QP), M22 and (4QP), M23 at 121VU
(8) On the FUEL System SD Page check that the Left and Right Transfer Valves return to the closed position.
4. Fault Isolation
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A. If:
(1) The multimeter reads 28VDC during the period that the valves are open.
(2) The valves close when the lead is reconnected to terminal 3 in Para 3.A.(4).
(3) Check/replace the RELAY-L OR R FWD XFR VALVE OPEN LATCH (14QP) .
(4) Do the test given in Para 3.A.
(5) If the multimeter does not read 28VDC in Para 3.A.(3)(b) above do a wiring check (Ref. ASM 28-15/02) of the:
- aircraft wiring between the terminal X, of the RELAY 14QP and the pin C, of the connector AA, at ACTUATOR 9QP
- aircraft wiring between the terminal X, of the RELAY 14QP and the pin C, of the connector AA, at ACTUATOR 10QP
- aircraft wiring between the terminal Z, of the RELAY 14QP and the pin 9E, connector AB, at FQIC 3QT
「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 238
201-299, 401-499, Aug 01/05 CES
- the suppression diode across terminals X and Z of the RELAY 14QP.
(6) Repair/replace all the unserviceable wiring, diodes, and connectors.
(7) Do the test given in Para 3.A.
(8) If the fault continues replace the FQIC (3QT) (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
(9) 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 239
201-299, 401-499, Aug 01/05 CES
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本文链接地址：A320 Trouble Shooting Manual 排故手册 FUEL 燃油1(36)
