N992KS is a Skiles Kenneth C RV-6A. It is a fixed-wing single-engine aircraft with 2 seats, powered by a Lycoming O&VO-360 SER rated at 180 horsepower. The registration is active, with the registrant based in Vale, OR. Its experimental airworthiness certificate was issued in Apr 1994. It has been registered to its current owner since May 2020. This page also carries 1 NTSB event.
2020
1994
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On September 14, 2022, about 1055 mountain daylight time, a Vans RV-6A, N992KS, was destroyed when it was involved in an accident near Preston, Idaho. The pilot and passenger sustained fatal injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight.
About 0911 on the morning of the accident, a flight of two airplanes, including the accident airplane, departed Ontario Municipal Airport (ONO), Ontario, Oregon, on a visual-flight-rules cross-country flight in visual meteorological conditions. According to the pilot of the second airplane, the accident airplane departed first, and the two pilots established a southeasterly course toward their planned fuel stop at Southwest Wyoming Regional Airport (RKS), Rock Springs, Wyoming. The second pilot reported that, about 1026, they encountered weather at 9,500 ft msl, and both pilots began climbing. The second pilot stated that he had maintained periodic visual contact with the accident airplane and about 1 nautical mile of separation; however, he lost visual contact with the accident airplane during the climb to 11,500 ft msl. A few minutes before leveling off, the accident pilot transmitted that he was “picking his way through the clouds,” and the second pilot observed the accident airplane on his ADS-B display at an altitude about 10,400 ft msl. He advised the accident pilot that he had no clouds at 11,500 ft, and shortly thereafter, saw the accident airplane at his altitude ahead and to the right of his airplane.
The second pilot took a cell phone video of the accident airplane, and subsequently obtained the weather information at RKS. He then relayed this information to the accident pilot and suggested that they maintain altitude, but stated that they should not have any problems descending upon reaching RKS. The accident pilot replied, “Sounds like a plan.” The second pilot stated that, while obtaining the RKS weather, he lost visual contact with the accident airplane.
ADS-B data indicated that, about 1045, the accident airplane began to descend on a southeasterly heading and reached an altitude of 9,775 ft at 1052 before subsequently entering a climb and turning left to an easterly heading, reaching 10,975 ft at 1054:23. The final data point, recorded at 1054:32, showed the airplane at 10,575 ft and suggested a northerly heading. The second pilot stated that, at approximately this time, the accident pilot transmitted over the radio that he was, “in a cloud and doing a 180°.” Both the second pilot and the Salt Lake City Air Route Traffic Control Center subsequently attempted to contact the accident pilot; no response was received.
The airplane impacted terrain about 2 nautical miles south of its final recorded position, and the accident site was located at an elevation of 9,209 ft msl.
The pilot held a private pilot certificate with a rating for airplane single-engine land. He did not hold an instrument rating. The pilot’s most recent flight review was completed in October 2020. In October 2019, the pilot reported 195 total hours of flight experience on his application for a Federal Aviation Administration (FAA) third-class medical certificate. The pilot completed the requirements for operation under BasicMed in August 2021.
According to FAA records, the pilot purchased the experimental, amateur-built airplane on March 20, 2020.
The pilot of the second airplane stated that, before departing on the accident flight, the accident pilot showed him the instrument panel on the accident airplane. The accident pilot had removed two vacuum-driven instruments and replaced them with a Bluetooth device that transmitted the data from the instruments to his tablet. The instrument panel had two open orifices where the vacuum system instruments were typically mounted.
Maintenance records indicated that the most recent condition inspection was completed on May 20, 2020. A condition inspection was initiated with an invoice date of August 31, 2022. However, the maintenance records provided during this investigation, do not reflect that the condition inspection was ever completed.
A pilot report issued at 1039 from a general aviation airplane at 11,500 ft msl and about 18 miles west of the accident site included 10 statute miles visibility and overcast clouds between 9,000 ft msl and 12,000 ft msl.
The cellular phone video footage from the second airplane depicted what appeared to be standing lenticular clouds. These clouds are generally the result of standing wave action, but do not guarantee hazardous conditions or turbulence. The video also depicted cumulonimbus and cumulostratus clouds ahead of the accident airplane (Figure 1).
Figure 1: Photo of accident airplane in the vicinity of clouds.
According to FAA records, the pilot purchased the experimental, amateur-built airplane on March 20, 2020.
The pilot of the second airplane stated that, before departing on the accident flight, the accident pilot showed him the instrument panel on the accident airplane. The accident pilot had removed two vacuum-driven instruments and replaced them with a Bluetooth device that transmitted the data from the instruments to his tablet. The instrument panel had two open orifices where the vacuum system instruments were typically mounted.
Maintenance records indicated that the most recent condition inspection was completed on May 20, 2020. A condition inspection was initiated with an invoice date of August 31, 2022. However, the maintenance records provided during this investigation, do not reflect that the condition inspection was ever completed.
The airplane impacted densely wooded, mountainous terrain at an elevation of 9,209 ft msl. The wreckage debris path was about 198 ft in length and 92 ft wide, oriented on a heading of 221° magnetic. The first identified point of contact (FIPC) with terrain was a small swath of compacted dirt about 5 ft by 1 ft, which contained fragments of blue paint. A subsequent medium swath of compacted dirt about 7 ft by 1 ft contained fragments of a red light lens along with blue and white paint chips.
The main structural components of the left wing, empennage, fuselage, and cabin were entangled in trees about 70 ft from the FIPC. The right wing was separated from the main wreckage and came to rest about 85 ft from the FIPC, near the spinner, propeller hub, and two propeller blades. The firewall and instrument panel separated from the main wreckage and came to rest about 98 ft from the FIPC. The engine was located about 132 ft from the FIPC. All major structural components of the airplane were located within the debris path. Examination of the accident site revealed no source of supplemental oxygen within the wreckage and the debris field.
Examination of the engine revealed that the vacuum pump was not installed on the accessory case and the orifice was covered by a blanking plate. The turn coordinator was present during the engine examination, remained in the instrument panel, and had sustained impact damage. The heading indicator and attitude indicator were not identified at the accident site or within the wreckage during the postaccident examination.
A Talos Avionics Aeolus-Sense unit was found in the wreckage. According to the manufacturer’s website, the unit integrates with the aircraft’s pitot/static system, and includes a barometric sensor, outside air temperature sensor with external probe, 3-axes gyroscopes, accelerometer, and magnetometer, and a GPS receiver. The unit is compatible with various tablet applications, through which it can provide artificial horizon, speed, and navigation information. The extent of the pilot’s operational experience with the unit and its display options was not determined.
Postaccident examination of the airframe and engine revealed no preimpact mechanical malfunctions or failures that would have precluded normal operation of the airplane.
The Franklin County Coroner’s Office in Preston, Idaho performed an autopsy of the pilot. The pilot’s cause of death was traumatic blunt force injuries due to a small airplane crash.
The FAA Forensic Sciences Laboratory performed toxicological testing on specimens from the pilot. No drugs of abuse or ethanol were detected.
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