Background
The accident occurred during a takeoff training exercise. The captain, who was not the pilot flying, reported a loss of power on the left engine shortly after reaching V1 speed, defined as the takeoff decision speed. However, the first officer, who was handling the controls, stated that the captain had retarded power on the left engine as part of a simulated emergency procedure, and that no preflight discussion of such a practice had taken place.
Sequence of Events
The airplane became airborne approximately 3,500 feet down the runway. Shortly after liftoff, the crew lost control of the aircraft, which then crashed to the left side of the runway. A fire erupted following the impact. Both crew members escaped with minor injuries.
Investigation
A teardown of the left engine was conducted under FAA supervision at the engine manufacturer's facilities. The manufacturer reported that damage found during the teardown was consistent with engine rotation and operation at the time of impact. Additionally, both airspeed indicator bugs were found set 9 to 11 knots below the V1 speed listed on the takeoff and landing data (TOLD) card. No evidence of any aircraft or engine malfunction, including an in-flight fire, was discovered at the accident site.
Probable Cause
The official probable cause determined by the investigation is the captain's inadequate preflight planning and preparation, and the subsequent improper response to a simulated loss of engine power, resulting in liftoff at an airspeed below that for which sustained flight was possible.