return to training cessna c500 fuel system return to training main fuel system components 2 x ‘wet...

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Cessna C500Cessna C500Fuel SystemFuel System

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Main Fuel System ComponentsMain Fuel System Components

• 2 x ‘Wet Wing’ fuel tanks

• 2 x electric fuel pumps

• 2 x ejector fuel pumps

• 2 x engine driven fuel pumps

• Crossfeed system

• 2 x Fuel Filters

• 2 x Firewall shut off valves

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Fuel System LimitationsFuel System Limitations

• G-LOFT Fuel Capacity 3,806lb

• Anti-icing Additive to be used (Prist)

• Normal Fuel Used JET A1

• Min Fuel Temp. (takeoff) -29ºC

• Max Fuel Temp. +48ºC

• Max Altitude 41,000ft

• Max Fuel Imbalance 800lbs

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AVGAS LimitationsAVGAS Limitations

• AVGAS is permitted under the following conditions

• Fuel temp. not to exceed 32º C

• Max OAT (takeoff) 32º C

• Boost Pumps are operating

• Hours are logged in engine logbook

• Max operating altitude 25,000ft

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• In NORM Position Boost Pump will Operate Automatically:

• During Start Cycle• During Crossfeed• When Low Fuel Pressure Is

Sensed In Engine Supply Line

Fuel System ComponentsFuel System Components

THREE POSN. BOOST PUMP

SWITCHES

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• In OFF Position Boost Pump will Operate Automatically:

• During Start Cycle• During Crossfeed

• In ON Position Boost Pump Will Operate Continuously


THREE POSN. BOOST PUMP

SWITCHES

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CROSSFEED SELECTOR

SWITCH

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FUEL QTY and

FUEL FLOW Indicators

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FASTER

Ejector pump Operation

MOTIVE FLOWOUTPUT

FUEL TANK

LOW PRESSURE

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Component Layout

Fuel SystemFuel System

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MANUAL SHUTOFF

MANUAL SHUTOFF

RH ENGFIREPUSH

LH ENGFIREPUSH

FUEL FILTBYPASS

P

L FUELPRESS LO

R FUELPRESS LO

P

CROSSFEED VALVES

IN TRANSIT

OFFRH

TANKLH

TANK

LHENG

RHENG

LH ENGINE RH ENGINE

LH TANK RH TANK

ENGINE DRIVEN PUMP

FUEL CONTROL

FLOW TRANSMITTER

OIL COOLER

FLOW DIVIDER

AUTO SHUTOFF

SUMP SUMP

BOOST PUMP

PRIMARY EJECTOR

PUMP

MOTIVE FLOWSHUTOFF VALVE

MOTIVE FLOWSHUTOFF VALVE

MOTIVE FLOW LINE

MOTIVE FLOW VALVE

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Normal Engine Start

(Left Engine)

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RH ENGFIREPUSH

LH ENGFIREPUSH

FUEL FILTBYPASS

P

L FUELPRESS LO

R FUELPRESS LO

P

CROSSFEED VALVES

IN TRANSIT

OFFRH

TANKLH

TANK

LHENG

RHENG

LH TANK RH TANK

ENGINE DRIVEN PUMP

FUEL CONTROL

FLOW TRANSMITTER

OIL COOLER

FLOW DIVIDER

AUTO SHUTOFF

MOTIVE FLOW SHUTOFF VALVE

MOTIVE FLOW SHUTOFF VALVE

RH ENGINELH ENGINE

MOTIVE FLOW VALVE

MOTIVE FLOW LINE

MANUAL SHUTOFF

MANUAL SHUTOFF

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Normal Operation

(Both Engines Running)

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P

FUEL FILTBYPASS

RH ENGFIREPUSH

IN TRANSIT

OFFRH

TANKLH

TANK

LHENG

RHENG

L FUELPRESS LO

R FUELPRESS LO

LH ENGFIREPUSH

P

CROSSFEED VALVES

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Crossfeed(Left tank supplying both engines)

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P

FUEL FILTBYPASS

RH ENGFIREPUSH

IN TRANSIT

OFFRH

TANKLH

TANK

LHENG

RHENG

L FUELPRESS LO

R FUELPRESS LO

LH ENGFIREPUSH

P

CROSSFEED VALVES

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P

FUEL FILTBYPASS

RH ENGFIREPUSH

IN TRANSIT

OFFRH

TANKLH

TANK

LHENG

RHENG

L FUELPRESS LO

R FUELPRESS LO

LH ENGFIREPUSH

P

CROSSFEED VALVES

IN TRANSITIN TRANSIT

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Fuel Filter Blockage

FUEL FLOW

FUEL FILTBYPASS

FUEL FILTBYPASS

FUEL FLOWFUEL FLOW

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Questions

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1• Concerning the fuel system, the correct statement is: • A. The FUEL BOOST pump switches have to be on

for engine start. • B. With the FUEL BOOST pump switches off, the

respective boost pump will automatically be energized whenever the respective START button is depressed, or when crossfeed from that tank is selected.

• C. It is normal for both fuel boost pumps to operate during crossfeed operation.

• D. The fuel boost pump will be automatically energized anytime the IGNITION switches are in NORM.

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2

• After engine start, the fuel boost pump is de-energized by:

• A. The FUEL BOOST pump switch • B. Start circuit termination • C. Discontinuing crossfeed • D. A time-delay relay

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3• Concerning the fuel system, the correct

statement is: • A. In the event of DC power loss, the primary

ejector pump ceases to operate and the engine flames out.

• B . The respective engine should be shut down if the respective FUEL FILT BYPASS annunciator illuminates.

• C. The FUEL BOOST switches should be on for takeoff and landing.

• D. The fuel filters should be inspected prior to the next flight if the FUEL FILT BYPASS light illuminates.

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4

• If the L or R FUEL BOOST ON annunciators illuminate without any action by the crew (engine operating normally), the probable cause is:

• A. The engine-driven fuel pump has failed.• B. The firewall shutoff valve has closed. • C. The low-pressure sensing switch has energized

the boost pump. • D. The fuel flow compensator has energized the

boost pump below 5 psi.

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5

• To verify that crossfeed is in fact occurring, it is necessary to:

• A. Monitor the FUEL QTY indicators for appropriate quantity changes.

• B. Only observe that the INTRANSIT light is out. • C. Ensure both FUEL BOOST ON lights are

illuminated. • D. Ensure that the FUEL BOOST pump switch for the

tank being fed is on.

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6

• When crossfeed is selected by positioning the crossfeed switch to LH TANK, and the green INTRANSIT light stays on:

• A. This is normal. • B . The boost pumps did not actuate. • C. One or both crossfeed valves did not fully

close. • D. One or both crossfeed valves did not fully

open.

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7

• Operation of the primary ejector pump is directly dependent upon:

• A. DC electrical power • B. High-pressure fuel from the engine-driven

fuel pump • C. AC electrical power supplied by the No. I

or No. 2 inverter • D. Flow from the transfer ejector pump

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8

• If the engine-driven fuel pump fails:• A. The engine will flame out. • B. The primary ejector pump will fail also, but the

boost pump will be energized by low pressure and will sustain the engine.

• C. The transfer ejector pumps will also be inoperative.

• D. Crossfeed must be selected in order to obtain high-pressure motive flow from the opposite engine.

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9

• If crossfeed has been selected and normal DC electrical power is lost (system switch in EMER with a dual generator failure):

• A. The system will remain in crossfeed. • B . The crossfeed valves will fail closed. • C. Both boost pumps will be energized to

terminate crossfeed. • D. The motive-flow shutoff valve will fail

open.

return to training cessna c500 fuel system return to training main fuel system components 2 x ‘wet...

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