Ultralite Sro Stingsport accident near Clermont, Florida, November 17, 2018

The NTSB's narrative final · quoted from the NTSB record

The pilot stated that he was in cruise flight when he received an automatic dependent surveillance-broadcast traffic alert of traffic approaching from his one o'clock position and closing at "a high rate of speed." The pilot went on to describe control inputs and airplane attitudes during his response to the perceived threat, which ultimately resulted in a loss of control and aerodynamic spin. During the pilot’s attempted recovery from the spin, the nose of the airplane pitched forward uncontrolled and the airplane entered a high-speed, nose-down descent. It is likely that during these remedial actions to regain control, the structure surrounding the horizontal stabilizer failed, and the stabilizer separated from the airplane. The pilot then successfully deployed the airplane’s ballistic parachute system, and it landed in a pasture. Examination of the failed structure surrounding the horizontal stabilizer revealed areas of delamination with dry glass fibers indicative of improper material layup with inadequate resin application. It could not be determined to what extent the inflight separation of the horizontal stabilizer was due to this defect, or whether the pilot’s control inputs during the response to the traffic warning, departure from controlled flight, and subsequent attempted recovery attempt imparted forces onto the horizontal stabilizer that were beyond its nominal structural capability.

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.