Given the specs Old Professer posted, I'm wondering how it got off the ground. Should we really believe there were 4 tons aboard? Assuming they had a reasonable amount of fuel along for the ride, looks like they would have been close to double the maximum payload. I don't know anything about aviation, but are planes really designed so they can lift off with nearly twice the load they can safely fly with?
How much weight could they strip out of the plane, seats, nonessential plumbing and wiring, walls, carpet, etc?
The question is one of how much fuel they would need to get to Mena, AR?