N6630DBeech 76 · 1979

The pilot and flight instructor had completed about two hours of multi-engine flight training and were performing a "zero thrust, single engine" full stop landing. A sink rate developed on final approach and the flight instructor told the pilot to "add a small amount of power to the right operating engine." The pilot misunderstood the instruction as "abort" and added full power to the right engine to abort the landing. The airplane rolled left and the flight instructor added right rudder to arrest the roll. The left wing hit the ground and the airplane rotated left on the ground, substantially damaging the airplane's left wing and collapsing the three landing gear. Neither pilot was injured. There were no mechanical anomalies that would have precluded normal operation.