Everything that happens to the 757 keeps restricting her altitude and speed so the Luftwaffe planes could reach and keep up with the 757. See more

Goofs

Early part of the movie, when they realize no other traffic is showing on radar, the Captain decides to "make a loop" to see if anything shows up. First off, a "loop" in an aircraft is a 360 degree move in the vertical plane, something never done with a commercial aircraft... he meant a turn. Second they started the maneuver by pushing forward on the control yokes which would begin a descent. In a turn, you normally descend unless you ease back on the yoke to maintain lift. See more