Optional Equipment
Supplemental Fuel System
CSP
−
902RFM207E
−
1
ROTORCRAFT FLIGHT MANUAL
MD900 (902 Configuration with PW 207E)
FAA Approved
Reissue 2
Original
10
−
31
PART VII
SYSTEM DESCRIPTION
The MD900 supplemental fuel system option adds a transfer type auxiliary
fuel
tank with a usable capacity of approximately 29.4 US gallons (200 LB, Jet-A) under
neath
the baggage compartment floor. The tank is filled through a gravity fill
port
on the right side of the aircraft. Transfer into the main tank is
performed using
a fuel transfer pump mounted in the auxiliary fuel tank.
Overfilling the main tank
is prevented by use of a float-type level control
valve mounted in the main tank.
This level control valve prevents transfer
into the main tank until the fuel remaining
in the main tank is less than
approximately 500 LB in normal ground attitude
or approximately 700
LB in normal cruise attitude. The level control valve will
shut off
transfer into the main tank if the fuel in the main tank increases to
approxi
mately 755 LB in normal ground attitude or approximately 832 LB in normal cruise
attitude. An inline check valve is installed in the fuel transfer line in the main
fuel tank to prevent backflow of fuel from the main tank into the auxiliary tank.
A second check valve may be installed in the auxiliary fuel tank transfer line that
prevents gravity transfer from the auxiliary tank into the main tank in high-speed
cruise flight. The auxiliary tank vent is teed into
the existing main tank aft vent
tubing.
The installation includes a
cockpit mounted fuel quantity gauge (AUX FUEL) for
the auxiliary tank, a fuel
transfer pump switch, and a fuel transfer indicator light
and on some installations, an additional grounding jack is located above the auxiliary
fuel tank filler.
Electrical power is supplied from the battery bus through the ``AUX FUEL'' 5 AMP
circuit breaker. A separate 1 AMP ``AUX FUEL XMIT'' circuit breaker provides
power for fuel quantity indicating. These circuit breakers are located on the baggage
compartment circuit breaker panel under ``BATTERY BUS''.
Summary of Contents for MD900 Explorer
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