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One of the pilots on American Airlines Flight 77—the third plane to be hijacked on 9/11—is not originally booked to be on that flight, and only accepts it shortly before September 11. American Airlines pilot Bill Cheng is originally due to fly Flight 77 on 9/11. But in late August he applies for that day off, so he can go camping. “When another pilot signed up for the slot, Mr. Cheng’s application was accepted.” Whether his replacement is Charles Burlingame, the plane’s captain, or David Charlebois, its first officer, is unstated. (Sciolino and Cushman 9/13/2001) Pilots on two of the other aircraft hijacked on 9/11 are also not originally scheduled to fly that day, but are booked onto those planes shortly before September 11 (see September 10, 2001, Shortly Before September 11, 2001, and Shortly Before September 11, 2001).
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