What happened
During a scheduled manufacturer test flight at San Marcos Airport, a twin engine airplane was performing several circuits as part of a local evaluation. While the copilot was managing the controls during a new approach, the aircraft failed to level off correctly. This resulted in a hard landing on the runway.
Despite the impact, all four occupants were able to exit the aircraft without sustaining any injuries. The aircraft itself suffered damage that rendered it a total loss.
Findings
Investigations into the incident identified that the primary cause of the accident was an improper level off during the final approach phase. This error occurred while the copilot was at the controls. Additionally, the findings noted that there was inadequate supervision of the flight operations by the pilot-in-command.