What am I doing wrong? When my center tank runs out of fuel, my engines shut off even though I have LOTS of fuel in the wing tanks! Only if I turn the center tank fuel pumps off will it then start to use the wing tanks. Why doesn't the 737 automatically start to use the wing tanks without me first shuting off the center pumps? Also, should I be attempting to use the wing tanks FIRST and THEN the center tanks? I almost never have more than 1000 lbs of fuel in the center tank. Finally, I always seem to be critically low on fuel if I use the guidance that the NAV log suggests for fuel I will need. When I add reserve fuel, does that get added to the total fuel used or is that seperate? In other words, if I estimate that I will need 5000lbs of total fuel, & I factor 2000 more in for reserve fuel, does the FMC think I will need 5000 lbs, while setting aside 2000 of the 5000 for reserve fuel, or does the FMC think I need a total of 7000 lbs - 5000 for the trip & 2000 more for reserve?Thanks!Chris

The engine flameout issue is solved in the upcoming SU2 release. About your other issue, perhaps a more knowledgeble somebody can answer.

Hi Chris,The reserved fuel is separate from the trip fuel. In other words, if you estimate that you need 5000 lbs for the trip and want 2000 more for reserves then you need to put 7000 lbs in your tanks. Then enter 2000 lbs under "reserves" on the "PERF INIT" page of the FMC. Then when the FMC estimates fuel requirements it will base the requirements on having 2000 lbs remaining in the tanks when you reach your destination. I'm no expert though so someone else please chime in if I am incorrect.Don

Chris,Depending upon the conditions, :45-minutes of

Chris,Depending upon the conditions, :45-minutes of