Cirrus SR22T HS-SYD Accident at Lamphun Temporary Airfield

Accident Overview and Flight History On 28 October 2021, a private Cirrus SR22T with registration HS-SYD departed Don Mueang International Airport for a temporary take-off and landing area in Pahsak Subdistrict, Mueang District, Lamphun Province. The flight was conducted under Visual Flight Rules (VFR) with a pilot and one passenger aboard. The aircraft was scheduled to depart at 15:00 local time but took off at 16:33, approximately 1 hour and 33 minutes later than planned. During the flight, the pilot reported mostly cloudy conditions along the route and occasionally climbed to 10,500 feet to remain above the clouds. As the aircraft approached Lamphun Province, weather conditions improved, and the pilot reported being on final approach at 18:21. Chiang Mai Approach Control then instructed the pilot to contact the temporary airfield, where the ground radio operator advised that Runway 19 was available for landing. ## Runway Environment and Impact The temporary take-off and landing area had a road passing through the runway, located approximately 809 meters from the threshold of Runway 19 and 45 meters from the threshold of Runway 01. The roadway was four lanes wide, with a central island and a roundabout, and the total width including the roundabout and island was approximately 49 meters. The report noted that the area was open to the public and nearby factory workers for evening exercise. Before aircraft operations, a security guard on a motorbike was to inform people to leave the runway, and road traffic was closed when the aircraft was approximately 5 nautical miles away. On the day of the accident, the passenger contacted the ground controller when the aircraft was about 10 nautical miles away, requesting that all traffic be closed and no vehicles allowed to pass. After touchdown on Runway 19, the pilot and passenger observed a person walking on the runway centerline in front of the aircraft, with their back to the aircraft. The pilot made a sudden and forceful turn to the left, and the right wing struck the person, who died. The accident occurred approximately 421 meters from the Runway 19 threshold, with touchdown occurring about 263 meters from the threshold. ## Aircraft Damage and Aftermath The rapid and violent turn caused the left main tire to separate from the wheel rim, the tube to break, and the tire and tube to become stuck in the wheel fairing. The left main wheel rim scraped the runway surface for 2.5 meters before the left-hand wheel hub edge broke and detached from the rim. The aircraft came to rest on the left edge of the runway, approximately 490 meters from the Runway 19 threshold, having turned 170 degrees. The aircraft sustained substantial damage, including impact damage to the leading edge of the right wing, a buckled and collapsed trailing edge flap on the right wing, a broken valve stem and tear in the left main wheel tube, a cracked and detached outboard edge of the left main wheel hub, and cracks and friction marks on the left main landing gear outboard wheel fairing. The runway surface was also damaged by a 2.5-meter scrape from the left main wheel hub. The pilot and passenger were not injured. The Aircraft Accident Investigation Committee for the Aircraft Accident and Incident Investigation Commission, Thailand, notified the United States of America as the state of aircraft design and manufacture. The final report was made publicly available on 26 November 2025.