TASK 28-24-00-810-812
Fuel LP Fuel Valve Engine 1 Opens Slowly, Closes Correctly
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
WARNING : WHEN YOU WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST EQUIPMENT
_______ THAT IS APPROVED TO EUROPEAN SPECIFICATION EN50-020. THE USE OF TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE FIRE OR AN EXPLOSION.
1. Possible Causes
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- ACTUATOR-LP FUEL VALVE, ENG 1 (9QG)
- VALVE-LP FUEL, ENG 1 (12QM)
- RELAY-ENG/MASTER 1 (11QG) 103VU126
- aircraft wiring (motor 1 open supply) between the RELAY-ENG/MASTER 1 (11QG), terminal A3, and the electrical supply connector 9QG-A, pin A
- aircraft wiring (motor 2 open supply) between the RELAY-ENG/MASTER 1 (11QG), terminal B3, and the electrical supply connector 9QG-B, pin A
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific multimeter
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R AMM 28-24-41-000-001 Removal of the LP Fuel Valve 12QM(13QM)
R AMM 28-24-41-400-001 Installation of the LP Fuel Valve 12QM(13QM) AMM 28-24-51-000-001 Removal of the LP Fuel Valve Actuator AMM 28-24-51-400-001 Installation of the LP Fuel Valve Actuator ASM 26-21/02 ASM 28-24/01 ASM 76-12/01 AWM 28-24-01 AWM 94-05-02
「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 ∞∞28-24-00∞∞∞∞∞∞∞∞∞∞Page 247
Nov 01/00 CES
3. Fault Confirmation
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A. Procedure.
NOTE : You can get more data from the:
____
- Aircraft Maintenance Manual (AMM) Chapters 26-12-00, 26-21-00, 28-24-00, and 76-12-00 - Description and Operation (D and O)
- Trouble Shooting Manual (TSM) - Task Supporting Data (Ref. P. Block 301)
- Aircraft Schematic Manual (ASM) (Ref. ASM 26-21/02), (Ref. ASM 28-24/01), and (Ref. ASM 76-12/01).
(1) On the ENG/APU FIRE PANEL (1WD) located on the overhead panel 20VU, make sure that the ENG 1 FIRE PUSH pushbutton switch (P/BSW) is in the closed and guarded position.
(2) On the ECAM Control Panel 11VU, push (in) the FUEL P/BSW to get the FUEL system page on the ECAM lower display unit (DU).
(3) Make sure the ENG/MASTER 1 (3KC) switch (panel 115VU) is set to OFF.
(4) On the FUEL system page make sure the ENG 1 LP fuel valve symbol shows that the valve is closed (amber crossline).
(5) Make a note of the valve transit time for the following actions:
NOTE : The LP fuel valve symbol shows a 45 degree amber line while in
____
transit.
(a) Set the ENG/MASTER 1 (3KC) switch (panel 115VU) to ON, and immediately observe the ENG 1 LP fuel valve symbol on the FUEL system page.
(b) Make sure the ENG 1 LP fuel valve symbol changes to open (green in-line).
(6) Make a note of the valve transit time for the following actions:
NOTE : The LP fuel valve symbol shows a 45 degree amber line while in
____
transit.
(a) Set the ENG/MASTER 1 (3KC) switch (panel 115VU) to OFF, and immediately observe the ENG 1 LP fuel valve symbol on the FUEL system page.
(b) Make sure the ENG 1 LP fuel valve symbol changes to closed (amber crossline).
「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 ∞∞28-24-00∞∞∞∞∞∞∞∞∞∞Page 248
Feb 01/98 CES
(7) If the ENG 1 LP fuel valve transit time from closed to open is 2 seconds, and the transit time from open to closed is 2 seconds:
- maintenance steps are not necessary.
NOTE : The above time of 2 seconds is correct for an aircraft with a
____ nominal supply voltage of 28VDC. If the 28VDC supply voltage is low or in ambient conditions of extreme cold the transit time of the actuator will be greater.
4. Fault Isolation
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A. If the ENG 1 LP fuel valve opens slowly, and closes correctly.
NOTE : This procedure is for a slow transit time in the OPEN direction
____
ONLY.
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 FUEL 燃油2(51)
