Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов

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Page 3-9
P/N 140-590032-0007
Revision A4: Sep, 2010
Section III Sub-section 3
FUEL SYSTEM
Pilot’s Operating Manual
ENGINE FUEL FEED SYSTEM
FUEL PUMPS
Two electrically operated fuel pumps, one per wing tank, located in the fuel reservoir (compartment
No. 1), supply fuel to their respective engines and also provide motive flow fuel to its associated jet
pumps. Non-return valves in the fuel pump outlets and the sides of the fuel pump reservoirs make sure
the direction of fuel flow is from the wing tanks to the engines. In the event of a single pump failure, a
cross-feed facility permits the operational pump to feed both engines.
Each fuel pump is controlled by a three position rocker switch on the flight compartment overhead roof
panel. The switch positions are: ON/OFF/EMERG. The normal operating position is ON, and power to
the pumps is taken from the PS1 busbar for the left pump and the PS2 busbar for the right pump.
When the EMERG position is selected both pumps are powered from PE busbar. Under normal
conditions, each fuel pump delivers fuel to its respective engine via a low pressure fuel cock.
Should both fuel pumps fail, fuel still gravity feeds into the fuel reservoir of each wing so that the engine
driven pumps can draw the fuel for operation under suction feed. Warning of pump failure is provided
by a FUEL 1 LO PRESS and/or FUEL 2 LO PRESS amber annunciator located on the overhead roof
panel. To alert the flight crew of these warnings, these annunciators are accompanied by a flashing
repeater annunciator located on the MWS panel.
JET PUMPS
Each fuel pump also supplies fuel to two jet pumps. One jet pump drains fuel from the wing manifold
stringers to maintain the wing reservoir full. It also makes sure a fuel supply is provided to the fuel pump
during momentary negative "g" conditions. The second jet pump forms part of the fuel transfer system
and induces a flow into the associated wing tank reservoir from either the opposite wing tank or the
ventral tanks, dependent on the transfer selection made.
The transfer system jet pumps also operate a scavenge system which continuously transfers fuel
between the center section beam and the fuel pump reservoirs to prevent water accumulation. Jet
pumps only operate when their inlets are completely submerged and when their associated fuel pumps
are on.
L PUMP
ON
EMERG
R PUMP
ON
EMERG
O
F
F
Overhead Roof Panel
FUEL 1
LO PRESS
FUEL 2
LO PRESS
and/or
and FUEL