Fuel System Malfunction; Inadvertent Fuel Flow Interruption - Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual

SECTION 3
EMERGENCY PROCEDURES

FUEL SYSTEM MALFUNCTION

INADVERTENT FUEL FLOW INTERRUPTION

Fuel flows by gravity from the wing fuel tanks, through two fuel tank
shutoff valves at the inboard end of each wing tank, and on to the fuel
reservoir which is located under the center cabin floorboard. After
engine start, the main ejector pump, located in the reservoir, provides
fuel to the engine-driven fuel pump at approximately 10 PSI.
If the main ejector pump should malfunction, a pressure switch will
activate the amber FUEL PRESS LOW annunciator as well as turn on
the auxiliary boost pump, anytime the FUEL BOOST Switch is in the
NORM position and fuel pressure drops below approximately 2.5 PSI.
Anytime the level of fuel in the fuel reservoir drops to approximately one
half full, the red RSVR FUEL LOW annunciator will come on. If this
occurs, the pilot should immediately verify that both FUEL TANK
SELECTORS, located in the overhead panel, are in the ON position
and set the IGNITION and FUEL BOOST Switches to the ON position.
There is only enough fuel in the reservoir for
approximately 1.5 minutes of engine operation at
maximum continuous power after the red RSVR
FUEL LOW annunciator comes on.
If the FUEL TANK SELECTORS have been left in the OFF position,
turning both valves ON will quickly fill the fuel reservoir and the red
RSVR FUEL LOW annunciator will go off. Once the cause of the RSVR
FUEL LOW condition has been determined and corrected (annunciator
will go off), the IGNITION and FUEL BOOST Switches can be returned
to their NORM positions.
3-52
WARNING
(Continued Next Page)
U.S.
CESSNA
MODEL 208B 867 SHP
GARMIN G1000
FAA APPROVED
208BPHCUS-00