The
flight data recorder and cockpit voice recorder were recovered on the afternoon of
September 13, buried 25 feet deep at the impact site, and have yielded additional information about the final half hour of the flight. In April 2002, in an unprecedented action, the cockpit voice recorder was played by the
FBI to relatives of the victims of the hijackers. Further details were released by the
9/11 Commission in July 2004.
Its full contents have not been made public. However, media reports of the tape indicate that the charge by the passengers and crew did take place. A woman can be heard pleading for her life at the start of the tape. This is thought to have been a flight attendant.
The tape was reported to have contained voices saying "
Allahu Akbar,"
English shouts that included "Let's get them!" and "In the cockpit. If we don't, we'll die" then screaming and other sounds followed by silence. Sounds of crockery smashing have led to the belief that a service cart was used as a battering-ram to force the cockpit door open.
The hijackers themselves appear to have all retreated into the cockpit prior to the charge, and they can be heard praying, reassuring themselves, and discussing on separate occasions, in Arabic, whether to use a fireaxe in the cockpit on those outside or to cut off the oxygen to quell the charge. Jarrah said "Is that it? Shall we finish it off?" Another hijacker replied "No. Not yet. When they all come, we finish it off." Jarrah later said "Is that it? I mean, shall we put it down?" to which another hijacker replied "Yes, put it in it, and pull it down." then later "Pull it down! Pull it down!"
The 9/11 Commission found from the recordings that, contrary to what many have believed, the passengers did not succeed in entering the cockpit before the plane crashed. The 9/11 Commission ruled that the actions of the passengers prevented the destruction of the Capitol building or the White House by causing the hijackers to abort the attack on their intended target.