What happened
On 18 July 2018, a Cessna 150M, registration N66778, was performing the sixth leg of a delivery flight from Florida to Argentina. After departing from Terrance B. Lettsome International Airport in the British Virgin Islands, the aircraft was observed by witnesses flying at a low speed with a high nose attitude along the runway. As the aircraft reached the end of the runway, it initiated a left turn. During this maneuver, the nose pitched up, the left wing dropped, and the aircraft entered a steep dive into the sea. The pilot, who was flying solo, was recovered from the wreckage by divers but unfortunately succumbed to his injuries.
The investigation
Investigators examined the wreckage and found no evidence of mechanical or engine failure. The engine appeared to be operating normally until impact. However, the investigation identified several irregularities regarding the aircraft's configuration and loading. An auxiliary fuel tank had been installed using unapproved methods, with tubing running over the wing leading edge, which could have disturbed airflow.
Analysis of the aircraft's weight and balance suggested the plane was likely operating above its maximum takeoff weight. The center of gravity was also estimated to be beyond the approved aft limit. Furthermore, several items in the cabin, including a suitcase and various supplies, were not secured and may have shifted toward the rear of the aircraft during the takeoff roll, further destabilizing the aircraft's pitch stability.
Findings
- The aircraft experienced an aerodynamic stall during a left turn shortly after takeoff.
- The aircraft was likely operating above its maximum takeoff weight and with a center of gravity beyond the aft limit.
- Unsecured items in the cabin may have shifted aft, exacerbating control difficulties.
- The installation of the auxiliary fuel tank did not meet approved standards.
- The pilot had completed significant flying hours in the preceding two days, suggesting fatigue may have been a contributing factor.
Safety action
Following the accident, the British Virgin Islands Airport Authority implemented changes to ensure that local search and rescue services can be contacted directly by air traffic control if the standard emergency number fails to reach the necessary responders.