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Unknown Icing Conditions

Gemini Sparkle

Key Takeaways:

  • A private pilot flying an instrument-rated Cirrus SR22-G2 encountered severe and unforecasted icing conditions at high altitude, overwhelming the aircraft's limited icing protection system.
  • Despite the initial impulse to descend, the pilot chose to climb further to get above the clouds, a decision which exacerbated the icing and led to a critical loss of airspeed and control.
  • The NTSB concluded the primary cause was the pilot's loss of control, with contributing factors including an inaccurate weather forecast that failed to predict severe icing and the aircraft being operated in conditions beyond its certified capabilities.
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A 473-hour instrument-rated private pilot, alone in a fully fueled Cirrus SR22-G2, took off from Reno, Nevada, early on a Sunday evening in February 2005. The sun had set half an hour earlier; the moon, above a layer of clouds, was a mere sliver. He had filed an IFR flight plan via Truckee and Sacramento with a destination of Oakland, California, 155 nm to the southwest. The cruising altitude was to be 12,000 feet. Reno, where the field elevation is 4,415 feet, was reporting an overcast at 5,500 feet, light winds, and a surface temperature of 6º Celsius with a 7º temperature-dew point spread. The pilot’s weather briefing, obtained from an FSS briefer an hour before the flight, put the freezing level at 6,000 feet and reported no precipitation in the area. No pilot reports were available for the route. When he filed his flight plan, the pilot told the briefer that he might request 14,000 once airborne.

The pilot contacted Oakland ARTCC as he climbed through 10,600 feet on the way to 14,000. A couple of minutes later he requested a clearance to climb to 16,000, in order to “see if I can get above these clouds.”

Peter Garrison

Peter Garrison taught himself to use a slide rule and tin snips, built an airplane in his backyard, and flew it to Japan. He began contributing to FLYING in 1968, and he continues to share his columns, ""Technicalities"" and ""Aftermath,"" with FLYING readers.

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