Originally Posted by
RockyBoy
4200 is when the lights come on. They changed that so they could run us with lower fuel and not have the lights come on all the time. If they want to they can plan you with lower than that, you just get the lights. You don't see it very often, but I have seen a number of times when the fuel was under 4200. Only seen it at 3900 once and the captain and I both scratched our heads for awhile. We had lots of taxi fuel in there for ATL and the lines were not long, so we didn't worry about it and had around 5K when it was all said and done.
Flight Crew Bulletin 08-02
The lights are modded to 2000lbs a side for a total of 4000lbs
45 minutes are cruise is 4200lbs
Flight Plan reserve fuel is 4200lbs
Unmodded planes light is on at 2500lbs total of 5000lbs
Flight plan reserve fuel is 5000lbs
FOM min fuel is based on when the lights come on
Flight plan reserve is the higher of 45mins (FAA requirement IFR) or FOM min.
I understand the mod lets them lower the fuel, but you still can't plan for under 4200 at destination. Unless I am reading it wrong.....