Sun Valley

Air traffic control cleared the flightcrew for the instrument landing system (ILS) approach to runway 24, which was 4,897 feet long. The flightcrew then reported that they had the runway in sight, cancelled their instrument flight rules (IFR) clearance, and executed a visual flight rules (VFR) approach in VFR conditions to the airport. The reported winds favored a landing toward the east, onto the opposite runway (runway 6). During the approach, after a query from the first officer, the captain indicated to the first officer that he was going to "...land to the east," consistent with the reported winds. However, the final approach and subsequent landing were made to runway 24, which produced a six-knot tailwind. During the approach sequence the captain maintained an airspeed that was approximately 30 knots higher than the correct airspeed for the aircraft's weight, resulting in the aircraft touching down about 1,500 feet further down the runway than normal, and much faster than normal. The captain then delayed the initiation of a go-around until the first officer asked if they were going around. Although the aircraft lifted off the runway surface prior to departing the paved overrun during the delayed go-around it impacted a localizer antenna platform, whose highest non-frangible structure was located approximately 304 feet past the end of the runway, and approximately two feet lower than the terrain at the departure end of the runway. The aircraft continued airborne as it flew over downsloping terrain for about 400 more feet before colliding with the terrain and a commercial storage building that was located at an elevation approximately 80 feet lower than the terrain at the end of the runway. The localizer antenna platform was located outside of the designated runway safety area, and met all applicable FAA siting requirements. The captain had type 2 diabetes, for which he took oral medication and monitored blood sugar levels. He did not reveal his history of diabetes to the FAA. The captain's post-accident toxicology testing was consistent with an elevated average blood sugar level over the previous several months; however, no medical records of the captain's treatment were available, and the investigation could not determine if the captain's diabetes or treatment were potentially factors in the accident. The captain of the accident flight was the sole owner of a corporation that was asked by the two owners of the accident airplane to manage the airplane for them under a Part 91 business flight operation. The two owners were not pilots and had no professional aviation experience, but they desired to be flown to major domestic airports so that they could transfer and travel internationally via commercial airlines. One of the two owners stated that the purpose of the accident flight was to fly a businessman to a meeting, and to also transport one of the owner's wives to visit family at the same destination. According to one of the owners, the businessman was interested in being a third owner in the accident airplane, so the owner permitted the businessman to fly. The owner also stated that the accident pilot told him that the passenger would pay for expenses directly related to the operation of the airplane for the flight (permitted under FAA Part 91 rules), and an "hourly fee" (prohibited under FAA Part 91 rules); however, no documentation was found to corroborate this statement for the accident flight or previous flights.

At 1407:11 the flight was cleared from Flight Level (FL) 240 to descend and maintain FL190. At 1409:08 the controller cleared the flight to descend and maintain 15,000 feet, and at 1409:17 the pilot read back the clearance in its entirety. At 1410:20 the controller instructed the pilot to expedite his descent through 16,000 feet for traffic; however, there was no response. From 1410:33 to 1417:21 the controller made ten attempts to contact the pilot; again, there was no response. At 1417:26 the controller requested the pilot to ident if he could still hear him. At 1417:38 the controller received an ident from the aircraft and instructed the pilot to descend and maintain 15,000 feet. At 1418:36 the controller cleared the aircraft for the GPS approach and to acknowledge with an ident. There was no response. The aircraft had impacted a rocky drainage trench near the base of rock outcropping on a magnetic heading of 200 degrees in a wings level, approximately 40-degree nose down attitude, 15 nautical miles east-southeast of the destination airport at an elevation of 5,630 feet mean sea level. An examination of the aircraft's flight control, pressurization, and electrical systems revealed no anomalies with these systems which would have precluded normal operations. A further examination of the thermal damage to the aircraft, determined that there was no evidence of an inflight fire. Both engines underwent a complete teardown examination revealing no evidence of catastrophic or pre accident failure, and that both engines were functioning at the time of impact. Radar data revealed the aircraft was in level flight at FL 190 for more than 4 minutes, when it had previously been cleared to 15,000 feet. It subsequently began a climb reaching an altitude of 20,300 feet before beginning a right descending turn followed by a left descending turn. The last radar return before radar contact was lost indicated the aircraft was at 15,900 feet and descending. No evidence was available that suggests icing greater than light rime icing was present in the area and that weather was unlikely to have been a factor in the accident. The pilot was on two medications for high blood pressure and one for high cholesterol. The pilot had recently been found to have an elevated blood sugar, suggesting early diabetes or some other systemic disease or injury. The pilot had a family history of heart disease and high blood pressure, and had at least one episode of chest tightness in the past. It is possible that he had some unrecognized heart disease. The circumstances of the accident suggest substantial impairment or incapacitation of the pilot. It is possible that the pilot experienced an event such as a stroke or heart attack related to his previous medical conditions or as a new occurrence. It is also possible that he became hypoxic as a result of a decompression event without using supplemental oxygen. There is insufficient information to conclude any specific cause for the pilot's impairment or incapacitation

During the transition from a DME arc to the ILS final approach course, the pilot allowed the aircraft to prematurely descend into the ground. The reason for the descent could not be determined. However, no preimpact mechanical malfunction with the aircraft was found nor was there any evidence supporting pilot incapacitation. Dark night conditions in fog and low ceilings prevailed during the approach. All three occupants were injured, two seriously.

Shortly after takeoff from Eagle County Airport, while climbing, the pilot reported problems with the nose door that open after rotation. While returning to the airport, he complete a turn when the airplane stalled and crashed near the runway. The aircraft was destroyed and all five occupants were killed.