"The trim is out of range"

[sho69607 29]

Silly question here. FS2crew says that the trim is out of range when attempting to operating the aircraft (747-400) at very light weights. The FMC is commanding a trim setting of 3.1, but when the captain reads back the trim in the before start checklist, he says "out of range" Does this mean the aircraft should not be operating at this center of gravity?

[byork 2,258]

Are you over the minimum weight for the aircraft?

 

[sho69607 29]

10 hours ago, byork said:

Are you over the minimum weight for the aircraft?

 

My TOGW was 448305lbs. I wasn't aware of the 747 having a minimum weight for takeoff. I know some aircraft like the MD80 require ballast fuel and can't fly under a certain weight, but I didn't know that was true for the 747 as well. If that's the case that was probably the issue then.