What happened
While operating a Twin Otter in a right-hand traffic pattern, the pilot initiated a visual approach toward the runway. During this maneuver, the aircraft encountered a left quartering headwind of approximately 15 knots that was subject to gusts. As the pilot transitioned to the final approach phase, the engine power was reduced to the low-speed range.
As the aircraft approached the runway threshold, the rate of descent increased significantly. Despite the pilot applying full engine power in an attempt to stabilize the descent, the aircraft could not be leveled out and impacted the terrain before reaching the runway. The accident resulted in 16 injuries among the occupants, with no fatalities reported.
Findings
Investigations into the incident identified several contributing factors related to the pilot's management of the approach and environmental conditions. The primary issues included an improper planned approach by the pilot in command and a delay in the application of powerplant controls. Additionally, the presence of turbulence and wind gusts contributed to the unstable descent. The aircraft experienced an inadvertent stall or mushing condition during the final stages of the approach, leading to the undershoot.