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A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - FUEL CONTROL AND MONITORING SYSTEM (FCMS)
Intentionally left blank
A330/A340 FLEET DSC-28-10-30 P 2/2
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - FUEL QUANTITY INDICATION AND LEVEL SENSING
A330/A340 FLEET DSC-28-10-40 P 1/6
FCOM 19 AUG 10
FUEL QUANTITY INDICATION
Applicable to: ALL
One FCMC is active and the other is on standby. If the first FCMC fails, then the other FCMC takes
over.
Each FCMC calculates the fuel quantity by using the :
Fuel ‐ volume from the fuel probes.
‐ Fuel density from the densitometers.
‐ Horizontal Stabilizer angle.
‐ Aircraft attitude.
‐ Fuel electrical characteristic from the compensators
The calculated fuel quantity is indicated on both the ECAM and the refuel control panel.
FUEL LEVEL SENSING
Applicable to:
The FCMC also uses information from the following fuel level sensors to control transfers and to
provide warnings, independently of the fuel quantity indication :
‐ Low level sensors :
• To trigger low level warnings and stop jettison.
• To control center and trim tank transfers.
‐ High level sensors : To stop refueling when a tank is full.
‐ Vent surge tank level sensor : To stop refueling, or fuel transfer, in case of tank overflow.
FUEL LEVEL SENSING
Applicable to:
The FCMC also uses information from the following fuel level sensors to control transfers and to
provide warnings, independently of the fuel quantity indication :
‐ Low level sensors :
• To trigger low level warnings.
• To control trim tank transfers.
‐ High level sensors : To stop refueling when a tank is full.
‐ Vent surge tank level sensor : To stop refueling, or fuel transfer, in case of tank overflow.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - FUEL QUANTITY INDICATION AND LEVEL SENSING
A330/A340 FLEET DSC-28-10-40 P 2/6
FCOM 19 AUG 10
FUEL LEVEL SENSING
Applicable to: ,
The FCMC also uses information from the following fuel level sensors to control transfers and to
provide warnings, independently of the fuel quantity indication :
‐ Low level sensors :
• To trigger low level warnings and stop jettison �� ..
• To control center and trim tank transfers.
‐ High level sensors : To stop refueling when a tank is full.
‐ Vent surge tank level sensor : To stop refueling, or fuel transfer, in case of tank overflow.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - FUEL QUANTITY INDICATION AND LEVEL SENSING
A330/A340 FLEET DSC-28-10-40 P 3/6
FCOM 19 AUG 10
ARCHITECTURE
Applicable to:
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - FUEL QUANTITY INDICATION AND LEVEL SENSING
A330/A340 FLEET DSC-28-10-40 P 4/6
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - FUEL QUANTITY INDICATION AND LEVEL SENSING
A330/A340 FLEET DSC-28-10-40 P 5/6
FCOM 19 AUG 10
ARCHITECTURE
Applicable to: ,
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - FUEL QUANTITY INDICATION AND LEVEL SENSING
A330/A340 FLEET DSC-28-10-40 P 6/6
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - ENGINE FEED
A330/A340 FLEET DSC-28-10-50 P 1/6
FCOM 19 AUG 10
GENERAL
Applicable to:
The main fuel pump system supplies fuel from each inner tank to its corresponding engine. In each
wing there are two collector cells, one for each engine. Each collector cell contains two fuel pumps,
one main and one standby. When closed, the crossfeed valves separate the system into four parts,
and their associated fuel pumps supply the engines. When open, the crossfeed valves allow any
pump to supply any engine.
GENERAL
Applicable to: ,
The main fuel pump system supplies fuel from each inner tank to its corresponding engine. In each
wing there are three fuel pumps. Two main fuel pumps in the collector cell and one standby pump
outside the collector cell. When closed, the crossfeed valves separate the system into two parts, and
their associated fuel pumps supply the engines. When open, the crossfeed valves allow any pump to
supply any engine.
MAIN COMPONENTS
Applicable to:
INNER TANK PUMPS
During normal operation, all main pumps run.
If a main pump fails, or is switched off, then the standby pump of that inner tank runs. With the
　
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