Air Transport

The ongoing investigation of the remains of Comair flight 5191 has found no mechanical or pre-impact failure to contribute to August’s fatal crash of the Bombardier CRJ100 (N431CA) at Lexington airport in Kentucky.

The latest US National Transportation Safety Board (NTSB) update issued last week also confirms that the aircraft never left the ground during the failed take-off from the airport’s general aviation runway during the 27 August accident in which all but one of the 50 people on board were killed. The first officer was the only survivor. An examination of why the crew chose the wrong runway to take off is ongoing, adds the safety board.

The NTSB says the aircraft had reached 137kt (153km/h) in the 32s it took for the aircraft to leave the 1,066m-long (3,500ft) runway 26, and passed through the perimeter fence before impacting trees 549m away on an adjacent horse farm 4s later. “Engines were examined at the accident site and no evidence of pre-impact failure was noted and the thrust reversers were stowed. The flaps were found in the take-off position and no problems were noted with any other aircraft system or structure,” says the NTSB.

The report notes a continuing examination of the lone air traffic controller’s actions after clearing the flight for take-off, and the effect of a runway upgrade that had required temporary changes to taxiways and signage.

Tests have found no illicit substances or alcohol in either pilot, and only a low level of over-the-counter decongestant in the first officer’s blood.