Factual error: At one point, Patroni (George Kennedy) opens the cockpit window and fires a flare gun. The Concorde is flying at a speed of Mach 2 (twice the speed of sound). If you stick your hand out a plane window at a speed of Mach 2, your hand will be snapped clean off.

Plot hole: In one scene saboteurs rig the Concorde's cargo door to automatically open suddenly in flight, on the principle that the rapid decompression will cripple the airplane & cause it to crash. At the critical time the door does start to open, but jams and only opens very slightly. Minutes go by, with the ajar hatch allowing air to freely pass through. Then, suddenly, the door unjams, and the compartment is shown losing air pressure dangerously fast. Problem is, that since the door had been cracked open for several minutes, the air pressure would surely have gotten to equilibrium by that time.