CHEYENNE — Federal investigators say ice most likely caused the crash of a small plane near Rock Springs last year, killing both people on board.
A report from the National Transportation Safety Board says the single-engine Bellanca 17-30A Viking descended rapidly after flying into an area where forecasts expected precipitation with supercooled droplets.
Investigators say that likely resulted in rapid ice accumulation on the plane. They found no indications of problems with the airframe, flight controls and engine before the crash.
The plane went down about 30 minutes after taking off from Pinedale en route to Fort Collins on May 18, 2011.
Pilot Gilmer Mickey of Englewood, Colo., and passenger Bob Albert of Fort Collins, Colo., both 55, died.