Elko

The airline transport pilot departed in the twin-engine, turbine-powered airplane on an air ambulance flight with two medical crew members and a patient on board in night visual meteorological conditions. According to a witness, during the initial climb, the airplane made a left turn of about 30° from the runway heading, then stopped climbing, made an abrupt left bank, and began to descend. The airplane impacted a parking lot and erupted into flames. In the 2 months before the accident, pilots had notified maintenance personnel three times that the left engine was not producing the same power as the right engine. In response, mechanics had replaced the left engine's bleed valve three times with the final replacement taking place three days before the accident. In addition, about 1 month before the accident, the left engine's fuel control unit was replaced during trouble shooting of an oil leak. Post accident examination revealed that the right engine and propeller displayed more pronounced rotational signatures than the left engine and propeller. This is consistent with the left engine not producing power or being at a low power setting at impact. Further, the abrupt left bank and descent observed by the witness are consistent with a loss of left engine power during initial climb. The extensive fire and impact damage to the airplane precluded determination of the reason for the loss of left engine power.

The aircraft was VFR inbound to the Hailey airport when the pilot contacted the tower at 1247 and reported 10 miles south. During the next 7 minutes the pilot and controller communicated back and forth and the pilot never visually acquired the airport. A number of witnesses located north of the airport observed the aircraft flying northbound along the highway into upsloping, mountainous terrain at an estimated altitude of 400 feet above ground, and with the landing gear extended and the engines developing power. The aircraft was described as low and slow and was observed to dip its wings during a left turn and then descend steeply to the ground. The aircraft impacted terrain in a steep nose down attitude. There was no evidence of flight control or powerplant malfunctions. High density altitude conditions existed at the accident site. Toxicological examination revealed a finding of 0.068 ug/ml and 0.183 ug/ml of Chlorpheniramine (an over-the-counter antihistamine) in kidney and heart tissue respectively.

The non-instrument rated pilot obtained an abbreviated weather briefing for a flight from Las Vegas to Elko, Nevada. He was advised of mountain obscuration, icing and turbulence, and was told that VFR flight was not recommended. A VFR flight plan was filed and activated. The airplane departed Las Vegas at 1414 pdt. The last radio communications with the plane was at 1545 pdt, about 14 miles south of Elko. Several local residents reported a thunderstorm was passing through the area at that time. The airplane was located the next morning about 10 miles southwest of Elko Airport near Grindstone Peak at about 6,000 feet msl. An exam of the airframe and engine at the accident site did not disclose any mechanical problems. During a toxicology test, 4.8 mg/kg of diphenhydramine (an antihistamine) was detected in the pilot's liver tissue. Both occupants were killed.

During arrival, the flight crew of SkyWest Airlines flight 5855 requested a VOR/DME-B approach to the Elko Airport, which was approved. As the approach continued, the flight crew reported over the Bullion VOR. Approximately 30 seconds later, the aircraft crashed. Impact occurred at the top of a mountain, about 100 feet before reaching the VOR station. Elevation of the crash site was about 6,460 feet; minimum published crossing altitude at the VOR was 7,000 feet. The airport was 4.1 miles from the VOR at an elevation of 5,135 feet.

Approximately 10 minutes after takeoff, the pilot stated he was returning to land due to a problem. On final the aircraft rolled inverted and descended nose down into a residence. Engine examination revealed a failed supercharger intermediate drive shaft gear resulting in loss of supercharger on the right engine. The aircraft was approximately 300 lbs over max gross weight. The landing gear was down and the flaps were extended approx 20°. The left throttle was found in the full forward (high power) position. The right prop control was in full decrease rpm, high pitch and the right engine magneto switches were off. Witnesses had observed the aircraft descend to below traffic pattern altitude. At approx 200 feet agl a loud engine noise was heard and the slow flying aircraft pitched up, rolled right and descended vertically about 1/2 mile from the airport. The pilot had not declared an emergency or defined his problem. The pilot's last recorded flight in the Beech 65 was in February 1988. There was no record of a check-out or flight training in the aircraft. Both occupants were killed.

On approach to Elko, the pilot encountered poor weather conditions with low ceiling, snow falls, turbulences associated with clouds and thunderstorm. He descended below the MDA until the twin engine airplane struck a hill located few miles from the airport. The wreckage was found three days later on December 2. Both occupants have been killed.

The crew departed Elko Airport in the early evening on a fire fighting mission in the region of Eureka. While flying at low height, the pilot-in-command initiated a sharp turn when control was lost. The airplane crashed in a hilly terrain and was destroyed by impact forces and a post crash fire. Both pilots were killed.