What happened
A multiengine training flight was underway when the crew attempted a touch-and-go landing. According to the instructor, the initial landing was normal and the student pilot completed the necessary aircraft cleanup. As the student applied full power for the takeoff portion of the maneuver, the aircraft initially yawed to the left. The student then overcorrected, causing the aircraft to yaw extremely to the following right.
The instructor took control of the aircraft and attempted to regain directional control, but noted that the rudder was not sufficiently effective. During the excursion, the aircraft departed the right side of the runway, striking trees, a fence, and a fence post. The aircraft eventually came to a stop in a shallow depression approximately 300 yards from the side of the runway.
A passenger in the rear seat later stated that while the instructor reached for the throttles, he only closed the right engine throttle. The left engine ceased operation only after the aircraft impacted a fence post.
The investigation
Investigators found no pre-impact problems with the aircraft or the powerplants. It was noted during the event that there were no brakes available on the right side of the airplane.