Approach and Landing
During a training flight, the student pilot and flight instructor prepared to land on runway 14 with partial flaps. The reported wind was from 190° at 17 knots. As they turned onto final approach, the instructor observed that the airplane was too high and not aligned with the runway. Near the touchdown point, they encountered turbulence. The instructor took control and executed a right wing-low partial slip. The airplane touched down halfway down the 3,740-foot runway with a high ground speed.
Braking and Runway Excursion
The instructor applied brakes, but they immediately locked. He released the brakes and tried reapplying them, but the airplane did not decelerate as expected. The airplane continued past the runway end, striking several airport lights, then traveled through two barbed wire fences. The right main landing gear separated, the left main landing gear collapsed, and the fuselage and horizontal stabilizer sustained substantial damage.
Post-Accident Observations
After exiting the airplane, the flight instructor and student pilot noticed the windsock indicated a strong quartering tailwind. The instructor stated that the accident was caused by an undetected shift in wind direction from a quartering headwind to a quartering tailwind, and also cited the incorrect decision to continue the approach and landing when the airplane was not stabilized.