NTSB Report: Aircraft crash at South Dakota wind project

HISTORY OF FLIGHT

On April 27, 2014, about 2116 central daylight time (CDT), a Piper PA-32R-300 airplane, N8700E, was destroyed during an impact with the blades of a wind turbine tower 10 miles south of Highmore, South Dakota. The commercial pilot and three passengers were fatally injured. The airplane was registered to and operated by a private individual under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Dark night instrument meteorological conditions prevailed for the flight, which operated without a flight plan. The flight originated from Hereford Municipal Airport (KHRX), Hereford, Texas, approximately 1700, and was en route to Highmore Municipal Airport (9D0), Highmore, South Dakota.

According to family members, the pilot and three passengers had been in Texas for business. The pilot's family reported that they had intended to leave earlier in the day, on the day of the accident, but elected to delay, and subsequently left later than they had planned. The family stated that most likely, the flight was going to stop at 9D0 to drop off one passenger before continuing to Gettysburg Municipal Airport (0D8), Gettysburg, South Dakota.

A fixed base operator employee at KHRX witnessed the pilot fuel the accident airplane at the selfserve fuel pump just prior to the accident flight. He reported that the fuel batch report showed 82.59 gallons of fuel had been dispensed. The pilot commented to the employee that he was going to "top it off" as he had "pushed his luck on the trip down." The pilot also discussed the weather conditions in South Dakota, noting that it was raining there. The pilot also added that the only reason they were leaving was because one of the passengers was anxious to get home. 

The pilot contacted the Fort Worth Lockheed Martin Contract Flight Service Station at 1711 when the airplane was 38 miles west of Borger, Texas, on a direct flight to North Platte, Nebraska. The pilot requested and obtained an abbreviated weather briefing. During this briefing, winds aloft and weather advisories for the reported route of flight were provided. The pilot also provided a pilot report for his position.

At 1812 the pilot sent a text stating that they were "Into KS aways" (sic). At 1923 he sent a text stating that they were "into NE". At 2054 he stated that they were flying by Chamberlain, South Dakota.

Several witnesses in the area reported seeing an airplane fly over their homes the evening of the accident. The first witness, located near the shore of the Missouri River, near Fort Thompson, South Dakota, reported seeing an airplane about 200 feet above the ground, flying to the northeast, about 2045. He stated that the airplane was low and was moving quickly.

The second witness, located a few miles southwest of the accident site, reported seeing an airplane flying at a very low altitude, headed north, about 2115. Neither witness reported hearing problems with the engine.

According to the Federal Aviation Administration (FAA), the airplane was reported  missing by a concerned family member when the airplane did not arrive in Gettysburg, South Dakota, on the evening of April 27, 2014. The wreckage of the airplane was located by members of the Hyde County Fire Department and the Hyde County Sheriff's department around 0330 on the morning of April 28, 2014. The pilot was not communicating with air traffic control at the time of the accident and radar data for the accident flight was not available.

OTHER DAMAGE

Wind turbine tower #14, part of the South Dakota Wind Energy Center owned by NextEra Energy Resources, was damaged during the accident sequence. One of the three blades was fragmented into several large pieces. One large piece remained partially attached to a more inboard section of the turbine blade. The inboard piece of this same turbine blade remained attached at the hub to the nacelle. The outboard fragmented pieces of the wind turbine blade were located in a radius surrounding the base of the wind turbine tower. The other two wind turbine blades exhibited impact damage along the leading edges and faces of the blades.