The 1994 St. Louis Airport collision occurred when TWA Flight 427, operated using a McDonnell Douglas MD-82, struck a Cessna 441 Conquest II during its take-off roll, killing both of its occupants.

The collision took place on November 22, 1994, at St. Louis Lambert International Airport (STL) in Bridgeton, Missouri.

[1]: 1–2 [3] Flight 427 was scheduled to depart STL at 21:34 Central Standard Time but pushed back from the gate about 15 minutes late.

"[4] Due to a large amount of spilled jet fuel, a fire hazard existed and an immediate evacuation was necessary.

[1]: 21 The resulting National Transportation Safety Board (NTSB) investigation determined that the Cessna had recently flown in from Iron Mountain, Michigan.

A commercial-rated pilot and a pilot-rated passenger, married to an employee of Superior Aviation, were on board as it left the ramp.

[2]: 9  In addition, the NTSB criticized the ground controller's use of non-standard phrasing and failure to require the Cessna pilot to repeat back the runway he was cleared to.

[1]: 47 [2]: 9 According to a NTSB spokesman, Flight 427's pilots averted a major disaster by pulling the aircraft to the left before impact, a maneuver that "avoided what would have been a much worse accident.

"[4] The NTSB recommended pilots should be required to read back runway assignments and controllers verify readback.

[citation needed] This article incorporates public domain material from websites or documents of the National Transportation Safety Board.