WHATEVER THE FUEL QUANTITY INDICATION -
IF THE FUEL LOW LIGHT ILLUMINATES:
BELIEVE IT,
I think that’s a general truism, and greater understanding could have saved many lives (Glasgow Police 135 jumps to mind). I know of a 155 that had a flame out after a blocked jet pump left the remaining fuel in the forward left tanks unusable, leaving the crew to believe they had more useable fuel than they did - but a red warning on, of course!