Cessna C500 Fuel System hello and welcome to my talk on the c500 fuel system

Main 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

Fuel 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

AVGAS 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

Fuel System Components In NORM Position Boost Pump will Operate Automatically: During Start Cycle During Crossfeed When Low Fuel Pressure Is Sensed In Engine Supply Line THREE POSN. BOOST PUMP SWITCHES

Fuel System Components 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

Fuel System Components CROSSFEED SELECTOR SWITCH

Fuel System Components FUEL QTY and FUEL FLOW Indicators

Ejector pump Operation OUTPUT FASTER MOTIVE FLOW LOW PRESSURE SUCTION FUEL TANK

Fuel System Component Layout

P IN TRANSIT MANUAL SHUTOFF SUMP CROSSFEED VALVES PRIMARY EJECTOR PUMP RH TANK LH ENG MANUAL SHUTOFF SUMP CROSSFEED VALVES PRIMARY EJECTOR PUMP BOOST PUMP FUEL FILT BYPASS MOTIVE FLOW SHUTOFF VALVE LH TANK RH TANK RH ENG FIRE PUSH LH ENG P L FUEL PRESS LO R FUEL MOTIVE FLOW LINE LH ENGINE RH ENGINE ENGINE DRIVEN PUMP FUEL CONTROL FLOW TRANSMITTER OIL COOLER FLOW DIVIDER AUTO SHUTOFF MOTIVE FLOW VALVE

Normal Engine Start (Left Engine) Fuel System Normal Engine Start (Left Engine)

P IN TRANSIT MANUAL SHUTOFF MANUAL SHUTOFF CROSSFEED VALVES LH TANK RH TANK LH ENG MANUAL SHUTOFF MANUAL SHUTOFF CROSSFEED VALVES FUEL FILT BYPASS LH TANK RH TANK RH ENG FIRE PUSH LH ENG MOTIVE FLOW SHUTOFF VALVE MOTIVE FLOW SHUTOFF VALVE P L FUEL PRESS LO R FUEL MOTIVE FLOW LINE ENGINE DRIVEN PUMP FUEL CONTROL FLOW TRANSMITTER OIL COOLER FLOW DIVIDER AUTO SHUTOFF MOTIVE FLOW VALVE LH ENGINE RH ENGINE

Normal Operation (Both Engines Running) Fuel System Normal Operation (Both Engines Running)

P P IN TRANSIT CROSSFEED VALVES OFF FUEL FILT BYPASS LH ENG FIRE PUSH RH TANK OFF TANK LH ENG RH ENG CROSSFEED VALVES FUEL FILT BYPASS LH ENG FIRE PUSH RH ENG FIRE PUSH P P L FUEL PRESS LO R FUEL PRESS LO

Crossfeed (Left tank supplying both engines) Fuel System Crossfeed (Left tank supplying both engines)

P P IN TRANSIT CROSSFEED VALVES OFF FUEL FILT BYPASS LH ENG FIRE PUSH RH TANK OFF TANK LH ENG RH ENG CROSSFEED VALVES FUEL FILT BYPASS LH ENG FIRE PUSH RH ENG FIRE PUSH P P L FUEL PRESS LO R FUEL PRESS LO

P P IN TRANSIT IN TRANSIT IN TRANSIT CROSSFEED VALVES OFF FUEL FILT LH RH TANK OFF TANK LH ENG RH ENG CROSSFEED VALVES FUEL FILT BYPASS LH ENG FIRE PUSH RH ENG FIRE PUSH P P L FUEL PRESS LO R FUEL PRESS LO

Fuel Filter Blockage FUEL FLOW FUEL FLOW FUEL FLOW FUEL FILT BYPASS

Questions

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.

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

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.

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.

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.

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.

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

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.

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.