What happened
Prior to departure, the pilot completed all necessary pre-start and engine start checklists without encountering any issues. Following a standard engine runup, the pilot initiated the takeoff roll in the twin-engine airplane. During the acceleration phase, approximately halfway down the runway, the pilot observed that the aircraft was not gaining speed at the expected rate.
In an attempt to lift the aircraft, the pilot initiated a rotation; however, the plane failed to climb and instead drifted off the runway surface. The aircraft subsequently settled back onto the pavement and continued traveling until it exited the far end of the runway. The incident resulted in substantial damage to the fuselage and the wings.
Findings
Data retrieved from the engine monitor indicated that both engines were producing power consistent with one another at takeoff power levels during the accident. Environmental conditions at the time of the event included a density altitude of 7,170 feet. While performance charts suggested that the available runway length was sufficient for a safe takeoff, the reason for the loss of performance remains undetermined.