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(Between 9:30-10:00 a.m.) September 11, 2001: Cockpit Voice Recording Begins

Key events of Flight 93 (times are based on a Pittsburgh Post-Gazette map and otherwise interopolated).Key events of Flight 93 (times are based on a Pittsburgh Post-Gazette map and otherwise interopolated). [Source: Yvonne Vermillion/ MagicGraphix.com] (click image to enlarge)Apparently, the only cockpit voice recording recovered undamaged from any of the 9/11 crashes is from Flight 93. It recorded on a 30-minute reel, which means that the tape is continually overwritten and only the final 30 minutes of any flight is recorded, though in practice sometimes the tape is slightly longer. Flight 93’s recording lasts 31 minutes and begins at this time. [Longman, 2002, pp. 206-207; CNN, 4/19/2002; Hartford Courant, 4/19/2004] According to one account, it begins seconds before the plane is hijacked. [Washington Post, 11/17/2001] However, the version of the tape later played for the victims’ relatives begins “too late to pick up the sounds of the hijackers’ initial takeover.” [MSNBC, 4/18/2002]

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

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