Accident Summary
The pilot of a twin-engine airplane reported that the takeoff was normal until about halfway down the runway, when the airplane was not accelerating as fast as expected. The pilot attempted to rotate, but the airplane "mushed off the runway." It then settled back onto the runway and exited the departure end, sustaining substantial damage to the wings and fuselage.
Pilot Report
According to the pilot, the "before starting engine" and "starting engine" checklists were performed without issue. An engine runup was completed, and the takeoff roll began. The pilot noted that the airplane's acceleration was insufficient about halfway through the takeoff roll. Despite the rotation attempt, the airplane veered off the runway.
Engine Data
Data from the airplane's engine monitor showed that both engines were operating consistently with each other and at takeoff power at the time of the accident. This suggests no mechanical discrepancy between the engines.
Performance Analysis
The density altitude at the time of the accident was 7,170 ft. According to the airplane's performance charts, the runway length was adequate for takeoff under those conditions. Despite this, the airplane failed to achieve sufficient performance.
Probable Cause
No specific cause could be identified for the loss of performance. The investigation concluded that the loss of performance occurred for reasons that could not be determined.