Hawker 800 XP, Pilot Training Manual

Page: 192 / 504

Two fuel quantity indicators, one for each
wing, are located on the center instrument
panel (Figure 5-4). They indicate fuel quan-
tity in pounds times one thousand. Seven trans-
mitter units in each wing are electrically
connected to each fuel quantity indicator.
A magnetic fuel quantity indicator is provided
for the ventral tank. The indicator is located be-
tween the two fuel quantity indicators and
shows FULL, crosshatch, and EMPT. The high-
and low-level float switches send signals to the
indicators when the tank is full and empty, re-
spectively. The indicator shows crosshatch
anytime the tank is anywhere between full and
empty and when electrical power is off. A
small residual amount of usable fuel will re-
main in the tank after the ventral tank quantity
indicator shows EMPT during the climb. The
AUX FUEL TRANSFER lever should be left
in the open position for 5 minutes after tran-
sition from climb to cruise to ensure that fuel
transfer is complete. The ventral tank low-
level float switch maintains a circuit to provide
low VMO speed warning at 280 KIAS until
ventral tank fuel has been transferred.
REFUELING
The airplane can be gravity refueled through
a filler cap in the outboard section of each
wing and in the left rear side of the ventral tank
(Figure 5-5). A rubber flapper valve is fitted
beneath each wing refuel cap to close the out-
let in the event of an improperly closed cap.
Pressure refueling and defueling are provided
by a single-point connection on the right side
of the airplane below the right engine. Pressure
refueling is controlled from a refueling con-
trol panel (Figure 5-6). The panel is located
adjacent to the vestibule right-hand bulkhead;
the panel illumination is controlled by the
door ENTRY LIGHT and vestibule ENTRY
LIGHT switches. Electrical power for fuel
valve positioning is available directly from
the PE bus bar or battery No. 1 through the re-
fueling control panel ON-OFF power switch.
An option is also available for an aft external
refueling panel.
Revision 1 5-6
FOR TRAINING PURPOSES ONLY
HAWKER 800 XP PILOT TRAINING MANUAL
FlightSafety
international
Figure 5-4. Fuel Indicators