The following is correspondence received from the U.S. Department of Transportation's Bureau of Transportation Statistics and the Office of Airline Information regarding requested information of the final flights of the 4 aircraft reportedly involved in the terrorist attacks of September 11, 2001. Of particular interest is the final "on-time" information for American Airlines flight 77 (N644AA) and United Airlines flight 93 (N591UA). Final "on-time" information for each aircraft could eventually be compared with similar information contained by the Flight Data Recorders (FDRs) for each aircraft in order to better determine the authenticity of the information attributed to each FDR. The NTSB refuses to provide unencrypted information from these FDRs, which would also include final "on-time" information for each aircraft for flights performed before September 11, 2001.














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