Incident
A pilot attempted a takeoff in an aircraft that was near its maximum gross weight. The density altitude at the departure airport was calculated to be 5000 feet. According to the aircraft's performance charts, the takeoff distance required under these conditions was approximately 5000 feet. However, the available runway length was only 3500 feet.
Sequence of Events
The pilot initiated the takeoff roll. During the takeoff, when the aircraft reached a rotation speed of 70 knots, the pilot attempted to rotate but the aircraft did not become airborne. Realizing that the aircraft would not fly, the pilot aborted the takeoff and applied maximum braking. Despite the braking effort, the aircraft was unable to stop within the remaining runway distance. It ran off the end of the runway and subsequently collided with an embankment.
Calculations
The pilot had calculated the density altitude to be 5000 feet. The aircraft performance charts indicated that under these conditions, the takeoff distance required was about 5000 feet. The runway available for departure was only 3500 feet, which was insufficient for a safe takeoff.
Abort and Outcome
During the takeoff roll, the pilot attempted to rotate at 70 knots. The aircraft did not become airborne. The pilot then aborted the takeoff and applied maximum braking force. Despite this, the aircraft could not stop before the end of the runway. It overran the runway and struck an embankment.