Introduction
A proficiency check flight conducted under dark night conditions resulted in a loss of control and subsequent collision with terrain. The flight involved a check pilot evaluating another company pilot serving as pilot-in-command (PIC).
Event Details
After a full-stop landing on runway 25, the crew completed the takeoff checklist. The PIC commenced a takeoff on runway 07. Following liftoff, the check pilot simulated a critical engine failure (designated as VI engine cut). The PIC was unable to accelerate to V2 speed, climb, or maintain directional control. The aircraft leveled off, airspeed began to decay, and the aircraft drifted to the right.
Despite the deteriorating situation, the check captain failed to take control or terminate the engine cut simulation. The aircraft subsequently collided with an ILS glideslope tower marked by red obstruction lights. Loss of control ensued when the right wingtip and aileron separated. The aircraft then impacted the ground and slid to a stop.
Findings
The takeoff flap position prescribed for the maneuver was 1/4. However, both flaps were found near the 1/2 flap extended position, and the flap handle was found in the 1/2 flap detent. Performance charts indicated that at the accident weight, the aircraft was capable of reaching V2 at 50 feet altitude within 6,500 feet of ground roll, then achieving a climb rate of +575 feet per minute at Vyse.