Notes References External links Cockpit Voice Recorder transcript (at tailstrike.com) Note that tailstrike.com‘s accident summary is from this Wikipedia article, as in December 2007, lightly copy-edited. FBI file on United Airlines Flight 553 Category:Airliner accidents and incidents in Illinois Category:1972 in Illinois Category:Midway International Airport Category:Aviation accidents and incidents in the United States in 1972 553 United Airlines flight 553 crash Category:History of Chicago Category:Accidents and incidents involving the Boeing 737 Original Category:Airliner accidents and incidents caused by pilot error Category:Conspiracy theories involving aviation incidents Category:December 1972 events in the United States