Fuel "Set Up"

[Mason]

Guys,

What is actually involved in a "fuel set up" on a piston twin. Say something like a Navajo or 400 series cessna. I'm under the impression that when it's done correctly, a large gauge or other equipment is connected to the engine with the cowling off and the settings are adjusted through a range of power settings. I'm dealing with a shop right now that seems to think that they can do it just by using the 30+ year-old analog fuel flow dial in the aircraft and the engines never seem to run right afterwards. Any opinions?

 

[bocefus]

Sound like you are referring to setting a TCM fuel system. The metered and unmetered fuels system pressures (flows) are checked and set by connecting a calibrated fuel pressure gauge. On turbo models, it must be referenced to upper deck pressure also. If they are using the gauges installed in the a/c, they are kidding themselves and not complying with the service bulletin

 

[Mason]

Sound like you are referring to setting a TCM fuel system. The metered and unmetered fuels system pressures (flows) are checked and set by connecting a calibrated fuel pressure gauge. On turbo models, it must be referenced to upper deck pressure also. If they are using the gauges installed in the a/c, they are kidding themselves and not complying with the service bulletin

Yup--these are turbo TCM engines. Do you know the service bulletin number?

 

[bocefus]

Sid97-3c