Some pilots called in to report consistently high Aircraft Fuel Flow indicator readings. If you have followed above installation procedure correctly, check for air entering system at selector valve. Here's a test: The next time the aircraft is flown in cruise, turn on the boost pump for one minute. If the fuel flow drops, then this is an indication that air is leaking into the fuel line upstream of the transducer. It is possible that air is leaking into the system through the seal valve or other connection. Fuel stain may not be visible.
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