「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 106-149, 229-299, 401-499, ∞∞28-11-00∞∞∞∞∞∞∞∞∞∞Page 205
Aug 01/05 CES
R **ON A/C ALL
TASK 28-11-00-810-806
Fuel - A Leak is Shown by Discrepancies in the Fuel On Board (FOB) and Fuel
Used (FU) Calculations During Flight
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
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1. Possible Causes
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- VALVE-LP FUEL, ENG 1 (12QM)
- VALVE-LP FUEL, ENG 2 (13QM)
- CHECK VALVE-FUEL RECIRCULATION, L (122QM)
- CHECK VALVE-FUEL RECIRCULATION, R (123QM)
- incorrect assembly
- damage
- fuel sealant
- unserviceable seal
- fuel tank leak
- engine fuel supply lines
- engine/IDG cooling return to tank fuel lines
2. Job Set-up Information
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A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-13-00-810-801 Fuel - Leak Shows at Drain Mast
AMM 28-43-00
IPC 281605-7
AMM 12-11-28-650-003 Pressure Refuel with Automatic Control
AMM 12-11-28-650-004 Pressure Refuel with Manual Control
AMM 12-11-28-650-007 Use of Magnetic Level Indicators (MLI)
AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
External Power
AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power
AMM 28-11-00-280-002 Fuel Tank Leak Checks
AMM 28-16-00-710-002 Operational Check of Pylon Check Valve to Ensure
Valve not Failed Open
AMM 28-16-42-000-001 Removal of the Fuel Recirculation Check-valve
AMM 28-16-42-400-001 Installation of the Fuel Recirculation Check-valve
AMM 28-24-41-000-001 Removal of the LP Fuel Valve 12QM(13QM)
AMM 28-24-41-400-001 Installation of the LP Fuel Valve 12QM(13QM)
AMM 28-25-00-650-001 Pressure Defuel
AMM 28-25-00-650-003 To Drain Remaining Fuel from the Wing Tanks and the
Center Tank
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-11-00∞∞∞∞∞∞∞∞∞∞Page 206
Aug 01/05 CES 3. Fault Confirmation
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A. Test
There is no fault confirmation test available for the values of Fuel On Board (FOB) and Fuel Used (FU) as used in the FOB and FU calculations. But, the airline operations, and the flight crew during flight, know the typical fuel load required for specfic flight legs. Thus all significant discrepancies must be investigated.
(1) Get as much data (as possible) about the fuel leak FOB/FU discrepancy and the subsequent steps of the unusual and/or emergency procedure used, from:
- the aircraft technical log
- the flight crew.
(2) Fuel On Board (FOB) The FOB value is supplied from the FQIS. If it is not shown degraded it can be accepted as correct for this TSM Task. If necessary use one of the two sub-procedures that follow: 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址:A320 Trouble Shooting Manual 排故手册 FUEL 燃油1(4)