Flight Profile and Simulated Emergency
The flight crew, consisting of a dual-student and a flight instructor, had completed several practice instrument approaches at night. They decided to conclude the flight with a simulated single-engine approach and landing. The simulated right engine failure was conducted in accordance with the manufacturer's recommended procedures.
Approach and Circumstances
Air traffic control cleared the crew for the Instrument Landing System (ILS) runway 30L approach, with a circle-to-land on runway 12R. The dual-student flew the instrument approach to the minimum descent altitude, then circled to the south to join the right downwind for runway 12R. While on the downwind leg, the dual-student climbed to traffic pattern altitude and extended the landing gear when abeam the touchdown point.
As the airplane turned onto final approach, it was slightly above the glide slope, at 90 knots, and left of the extended runway centerline. When the airplane was on one-quarter mile final for the runway, it was on glide slope and fully configured for landing, but remained left of the extended centerline, approximately aligned with the runway edge lighting.
Go-Around and Impact
Approximately 20 to 30 feet above ground level, the dual-student banked the airplane about 10 to 15 degrees to the right. The flight instructor stated that the student's actions made him uncomfortable, given the proximity to the ground. He assumed control of the airplane and initiated a go-around. As he advanced the engine throttles and pitched up for the go-around, the airplane yawed and banked to the left. His corrective flight control inputs were ineffective, and the airplane impacted left-wing low in the grass area off the left side of the runway.
Post-Accident Inspection
During a post-accident inspection, no flight control anomalies were noted.