Sequence of Events
A dual instructional flight was returning to its home base after a session. The dual student was piloting the aircraft and allowed the final approach flight path to become too low and fast. The certified flight instructor (CFI) assumed the controls, executed a go-around, and reentered the traffic pattern. After explaining what the student had done wrong, the CFI relinquished the controls back to the student.
On a subsequent final approach, the aircraft's airspeed was too fast. When the aircraft was about one-quarter mile from the approach end of the runway, the CFI again assumed the controls, but did not execute a go-around. Instead, the CFI retarded the throttles and landed about one-third beyond the end of the runway at a high airspeed. The CFI did not believe he had sufficient runway remaining to execute a go-around and attempted to stop, but the aircraft exited the runway and collided with a ditch.
Wind Conditions
According to the CFI, the aircraft landed with an equivalent direct tailwind of 6 knots. The approach control reported the surface winds to be a left quartering headwind.
Notes
The report does not specify the aircraft type, registration, date, operator, location, or any injuries or damage incurred.