Fuel Flow

[donsak]

I posted this on LOBO Live and wanted to be the first post on the new LancairLive.

Flying from KSRQ Sarasota, Florida at FL280 for 2 hours and all engine parameters are normal. Fuel Flow is 37 GPH
Then I notice the Fuel Flow is erratic and goes to Zero. All else is normal.
I switch on the electric fuel pump, no change.
I switch fuel tanks, no change
Reading starts up again to 55 for an instant then decreases down to 10, 5, 0
Upon descending into KPTK Pontiac, Michigan the fuel flow starts to climb and stops at 37. It then seems to operate normally until we land and taxi to hangar.

I'm thinking the Fuel Transducer is giving me a warning. It was installed March 2018 as the previous one developed a leak.

Anyone have a diagnosis or recommendation?

Fuel Flow issue 12-14-2022.jpg (153.8 KiB) Viewed 1734 times

[Ryan Riley]

Don, I’d have to agree that it sounds like a transducer or grounding issue. Did you ohm test the transducer?

[George Wehrung]

I agree with the grounding issue. I also agree it’s likely a transducer as the fuel pressure is working and no kidding the engine runs…

If you have the wiring diagram see if the ground is a separate wire from the transducer direct to a ground or from the G1000 connection for the engine monitor.


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[donsak]

I haven’t investigated yet. I appreciate all the suggestions

[Ryan Riley]

Don, report back when you figure it out. Hopefully it's an easy fix.

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