ASN Wikibase Occurrence # 161946
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| Date: | Wednesday 6 November 2013 |
| Time: | 09:10 |
| Type: |  Cessna U206F Stationair |
| Owner/operator: | McCall Air |
| Registration: | N206KL |
| MSN: | U20602655 |
| Year of manufacture: | 1975 |
| Total airframe hrs: | 16511 hours |
| Engine model: | Continental Motors IO 550F |
| Fatalities: | Fatalities: 3 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | 10 miles east of Donnelly, ID -
 United States of America
|
| Phase: | En route |
| Nature: | Passenger - Non-Scheduled/charter/Air Taxi |
| Departure airport: | McCall, ID (MYL) |
| Lower Loon Cree, ID (C53) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Before departing on the cross-country flight over mountainous terrain, the accident pilot and two other pilots going to the same remote airstrip discussed the weather and checked webcams positioned throughout the passes. The accident pilot took off first and flew south before turning east to cross the mountains, while the other two pilots chose to fly north before crossing the mountains. Inflight radio communications from the accident pilot indicated that when he first turned east to cross the mountains, he encountered weather that required him to turn around and fly further south before turning east again. No further radio communications from the accident pilot were heard. The other two pilots reported encountering marginal weather with low clouds during their flights to the destination, which they completed without incident. Flight track data downloaded from the accident airplane's onboard GPS unit indicated that, during the final 40 seconds of the flight, the airplane made a left turn of about 90 degrees followed by a right turn of about 180 degrees while maintaining an altitude of about 8,150 ft. This flightpath suggests that the pilot was following the contour of the horseshoe-shaped ridgeline at that location. However, the ridgeline varied in elevation between about 8,000 and 8,200 ft, and the airplane impacted steep, heavily wooded terrain about 100 ft below the top of the ridgeline.
A postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation. Due to the location of the accident site, weather reporting stations and weather products were limited. Satellite imagery did not show low-level clouds because of a mid-level cloud layer at 15,000 ft. A weather model run to simulate relative humidity over the accident site revealed that the lower altitudes above terrain likely had a much lower visibility with relative humidity greater than 98%. Thus, it is likely that the pilot was maneuvering the airplane in or near low clouds when he lost visual contact with the ground resulting in controlled flight into terrain.
Probable Cause: The pilot's failure to maintain clearance from terrain while maneuvering in likely low-ceiling and low-visibility conditions in mountainous terrain.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=206KL
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 07-Nov-2013 07:04 | gerard57 | Added |
| 07-Nov-2013 16:04 | Anon. | Updated [Registration] |
| 07-Nov-2013 16:31 | Geno | Updated [Aircraft type, Cn, Operator, Location, Departure airport, Source, Narrative] |
| 07-Nov-2013 20:46 | tc | Updated [Source] |
| 08-Nov-2013 23:14 | Geno | Updated [Time, Total fatalities, Other fatalities, Location, Nature, Destination airport, Source, Damage, Narrative] |
| 09-Nov-2013 08:57 | Alpine Flight | Updated [Time, Departure airport, Damage] |
| 14-Nov-2013 17:25 | Geno | Updated [Time, Operator, Location, Nature, Departure airport, Destination airport, Source, Narrative] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 29-Nov-2017 09:23 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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