Assuming the correct tank to engine config(crossfeeds !!!) You are correct the ovrd would supply until low level,due to higher ouput pressure.Flame out should not occur as long as sufficient FOB and no real strain on pumps as check valves and runaround are built into the AC fuel supply system (output px 45 psi as opposed to 22 psi approx iirc)If you forget the crossfeeds then a whole different scenario can and will develop.
Last edited by kingstonboy; 4th September 2011 at 10:56.
Reason: omission