Runway Excursion During Approach and Landing (N6503C)

Incident Overview and Initial Approach Reports During the approach for landing, the commercial pilot at the controls and the flight instructor seated in the right seat reported that the stall warning horn sounded approximately four feet above ground level over the runway. In response, the commercial pilot reduced engine power. The aircraft then descended rapidly to the runway surface, touching down slightly left of the centerline in a nose-high attitude. Following touchdown, the commercial pilot applied full power, but the aircraft began to veer to the left. The flight instructor subsequently took control of the aircraft in an attempt to restore runway heading. Initially unaware that full power had been applied, the flight instructor instructed the commercial pilot to reduce power. Although power was reduced, the aircraft continued to move off the runway surface and traveled over gravel and snow. During the landing roll, the right wing struck a taxi sign. The collision caused the outboard section of the right wing flap to separate at the two outboard flap hinges, and the right main landing gear tire separated from the gear leg. Both pilots reported that no mechanical failures or malfunctions were present in the aircraft at the time of the accident.