On January 9, 2007, at 2323 central standard time, a Gates Learjet model 24F airplane, N444TW, serial number 348, was destroyed upon impact with terrain, about 18.8 nautical miles east of Guadalajara, State of Jalisco, in the Republic of Mexico. The airline transport-rated pilot and the commercial pilot functioning as first officer were fatally injured. The airplane was registered to the Sierra American Corporation of Wilmington, Delaware, and was being operated by Ameristar Jet Charter, Inc., of Addison, Texas, as Ameristar flight 878, a Title 14 Code of Federal Regulations Part 135 on-demand cargo flight. Night visual meteorological conditions prevailed and an instrument flight rules (IFR) flight plan was filed for the flight from Laredo, Texas. The cargo flight had originated in Laredo, Texas, at about 2210, with the Don Miguel Hidalgo International Airport (MMGL) near Guadalajara, Mexico, as its intended destination.

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