Witness Observations
Witnesses reported observing the aircraft performing aerobatic maneuvers at an estimated altitude of 1,000 to 1,300 feet. After completing a loop, the aircraft was seen to nearly come to a stop while in a vertical attitude, then fell off to the left and entered a spin. The spin continued until just prior to impact with the ground.
Lack of Parachutes
None of the occupants were wearing parachutes, as required by Federal Aviation Administration (FAA) regulations for aerobatic flight. This non-compliance with safety equipment rules was noted in the investigation.
Pilot's Aerobatic Experience
A review of the pilot's flight logbook revealed no record of any aerobatic instruction. This indicates the pilot may not have received formal training in the maneuvers being performed.
Aircraft Manufacturer Guidance
According to the aircraft manufacturer, loops and intentional spins are prohibited in this particular aircraft model. The manufacturer's operating limitations explicitly forbid such maneuvers, which suggests the flight may have been conducted outside the approved flight envelope.
Summary
The accident sequence involved a loop maneuver followed by a stall and spin at low altitude, with occupants not wearing required parachutes and the pilot lacking documented aerobatic training. The aircraft manufacturer prohibits both loops and intentional spins in this model.