What happened
An unauthorized flight occurred when an individual without the necessary pilot certification operated a multiengine airplane without the consent of the aircraft owner. The flight was intended to involve maneuvers within the local traffic pattern. While the aircraft was transitioning from the base leg to the final approach, it experienced a sudden stall. This resulted in a nose-down descent that culminated in a crash.
Findings
Investigations into the accident revealed that the pilot was operating the aircraft without proper authorization or credentials. A critical factor in the loss of control was the condition of the aircraft's instrumentation. The pilot was reportedly unaware that the static system ports had been covered with tape to facilitate ongoing avionics maintenance. This obstruction of the static ports prevented accurate airspeed readings, contributing to the aerodynamic stall.