Tue, Oct 10, 2023
Pilot Allowed The Airspeed To Decrease During The Approach, Increased Pitch Attitude, And Exceeded Critical Angle Of Attack
Location: Beaver Island, Michigan Accident Number: CEN22FA031
Date & Time: November 13, 2021, 13:49 Local Registration: N866JA
Aircraft: Britten-Norman BN-2A Aircraft Damage: Substantial
Defining Event: Aerodynamic stall/spin Injuries: 4 Fatal, 1 Serious
Flight Conducted Under: Part 135: Air taxi & commuter - Non-scheduled
Analysis: A pilot-rated witness observed the airplane during the final approach to the destination airport and stated that the airplane was flying slowly, with a high pitch attitude, and was “wallowing” as if nobody was flying. The airplane stalled and impacted the ground about 300 ft from the runway. GPS and automatic dependent surveillance-broadcast (ADS-B) data captured the accident flight, but the ADS-B data ended about 0.24 miles before the accident. GPS data showed that the airplane’s speed was at or near the published stall speed for the airplane’s given loading condition.
The airplane sustained substantial damage to the fuselage and both wings. Examination of the airplane verified flight and engine control continuity. No preimpact anomalies were found with respect to the airplane, engines, or systems.
The pilot allowed the airspeed to decrease during the approach, increased pitch attitude, and exceeded critical angle of attack, which resulted in an aerodynamic stall and spin into terrain.
Probable Cause and Findings: The National Transportation Safety Board determines the probable cause(s) of this accident to be -- The pilot's exceedance of the airplane's critical angle of attack during final approach, which resulted in an aerodynamic stall and loss of control at an altitude too low to recover.
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