Amateur-built HARMON ROCKET N85TP accident near Porter, New York

Probable cause

The pilot’s failure to maintain control of the airplane while initiating a low-altitude aerobatic maneuver, which resulted in impact with trees and terrain. Contributing to the accident was the pilot’s high-risk behavior.

NTSB analysis

According to witnesses, the pilot took off and performed a 180° descending turn back toward the airport. He then flew a high-speed, low altitude pass along the runway before pulling up and descending into the trees. One witness reported that the airplane appeared to enter a roll as it descended into the trees near the end of the runway.

Postaccident examination of the airframe and engine revealed no evidence of a preimpact mechanical malfunction or failure that would have precluded normal operation. Metallurgical examination of a propeller blade tip that its separation from the propeller blade was likely the result of impact-related damage.

Witnesses who knew the pilot and frequently saw him take off stated that after takeoff he typically made a 180° turn, and flew a high-speed low pass over the airport before climbing and entering a barrel roll. The pilot’s routine performance of high-speed flyovers and low-altitude aerobatics was indicative of high-risk behavior. Based on the available information, the pilot likely lost control of the airplane while performing an aerobatic maneuver at an altitude too low to recover.

Text from the NTSB. Open the NTSB docket for ERA23FA266 for the full record.