FQI vs Fuel used accuracy
Was a flight test engineer on 125 back in the 1980s and seem to remember that the fuel quantity indicating system had an accuracy of +/- 0.5% but the fuel flow meter accuracy was considerably worse.
I can't remember the accuracy figures for these fuel flowmeters and am unaware of any technical developments which may have changed the situation.
Currently working with the 737 and would appreciate any "ball park" accuracy figures for FQI vs Fuel Used indications on a modern jet aircraft?
Thanks in advance