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High indicated fuel flow

 

 

1. Restricted flow beyond metering valve. Plugged fuel injection nozzles if accompanied by loss of power and roughness. Flow check nozzles in containers to locate plugged nozzle. If plugged, soak in acetone and blow out with compressed air. Clean fuel injection nozzles by soaking in Hoppies No. 9 (available at gun shops) for 20 minutes. Rinse in acetone or M.E.K (methyl ethyl Ketone).


2. Air leak or restriction in deck pressure gauge line. Pressure check to 9 pounds and observe gauge for drop in pressure.


3. Injector rich.


4. Faulty fuel flow gauge.


5. Inside diameter of fuel lines too small (Lycoming engines). Lines must be between 0.85 and .090 inches I.D. Use of primer line instead of fuel injector line.


6. Incorrect nozzle flow. Flow nozzles into containers.


7. Cracked or broken fuel injector nozzle line. Look for fuel stains around silver solder.
8. Deck pressure gauge line plugged.


9. Restricted re-circulation passage in Continental fuel pump.


10. (Continental turbocharged engines) Plugged reference line. Metered fuel flow (pressure) gauge is dependent upon deck pressure to buffer the action of the fuel pressure in the Bourbon tube, acting through the vent port of the gage. As in all other turbocharged Continental engines, if this reference line becomes plugged, a high indicated metered fuel flow (pressure) will be apparent, although actual pressure will be within limits. (The Bonanza has a tiny orifice at the controller end that is prone to plug up.)

Parachute Sense US Navy 1944Don't start wondering how it feels to sit down on the horns of a bull. He'll duck. Parachute Sense US NAVY 1944

  

 


 

 

 

 

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Disclaimer: sacskyranch.com contains abundant information relating to aircraft maintenance. The information provided  is not intended to supercede or supplement the F.A.A. approved  maintenance and/or operator’s manuals. Those F.A.A. approved manuals must be utilized when performing maintenance and/or operating aircraft.