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Unknown Icing Conditions

Gemini Sparkle

Key Takeaways:

  • A pilot crashed a non-FIKI Cirrus SR22 due to severe airframe icing after electing to climb further into clouds, despite his aircraft's limitations and an initial consideration to descend.
  • The accident was compounded by an inaccurate weather briefing that failed to predict severe icing conditions from supercooled large water droplets at altitude.
  • The aircraft's "icing protection system" was insufficient for the rapid ice buildup, and its operating handbook explicitly prohibited flight into known icing conditions.
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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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