What happened
During an instrument proficiency check (IPC) intended to provide instruction, a pilot and a flight instructor were operating an aircraft. The session began after an hour of routine training. During the initial takeoff phase of the proficiency check, the instructor maintained control of the throttles while the pilot managed the flight controls. The instructor set the manifold pressure to approximately 3ally 37 inches, which was lower than the pilot's standard 40 inches, leading to a takeoff roll that exceeded normal length.
Shortly after the aircraft departed the ground, while at an altitude of less than 100 feet and with the landing gear still extended, the instructor reduced power to the left engine. This occurred while the aircraft was traveling between 83 and 85 knots, which represented the minimum single-engine control speed for the aircraft type. The pilot attempted to increase power to compensate, but could not reach the throttles because the instructor's hand was obstructing access. Consequently, the aircraft experienced a sharp left veer and a roll. Although the pilot managed to level the wings, the aircraft ultimately struck trees and the terrain. There were 0 fatalities reported in this incident.
Findings
Investigation into the event revealed that the pilot and instructor had not previously discussed the specific procedures for simulating or demonstrating an engine failure. Additionally, the instructor noted that he had not operated this specific aircraft type recently. While the instructor was managing type II diabetes with medication, there were no reports of seizures or loss of consciousness related to his medical condition prior to the accident. The uncoordinated reduction of power by the instructor served as the primary factor in the loss of directional control.