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A C210 commercial pilot loses control of his aircraft for a short period of time and nearly climbs into the class a airspace of ZDV when encountering an updraft from nearby clouds. He had been flying 'off altitude' VFR at 17800 ft to avoid cloud buildups.
| Attributes | |
| ACN | 423641 |
| Time | |
| Date | 199812 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : den |
| State Reference | CO |
| Altitude | msl bound lower : 17500 msl bound upper : 18000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : phx |
| Operator | general aviation : corporate |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial |
| Experience | flight time last 90 days : 65 flight time total : 4500 |
| ASRS Report | 423641 |
| Events | |
| Anomaly | inflight encounter : weather inflight encounter other non adherence other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited adverse environment |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Conditions: moderate turbulence. In maintaining VFR separation from cloud tops, it was necessary to cruise at 17800 ft for about 10 mins. During that time, an updraft forced us up into class a airspace momentarily. Estimate FL180.2, altimeter was set at 30.04 so may not have been at FL180 at 29.92.
Original NASA ASRS Text
Title: A C210 COMMERCIAL PLT LOSES CTL OF HIS ACFT FOR A SHORT PERIOD OF TIME AND NEARLY CLBS INTO THE CLASS A AIRSPACE OF ZDV WHEN ENCOUNTERING AN UPDRAFT FROM NEARBY CLOUDS. HE HAD BEEN FLYING 'OFF ALT' VFR AT 17800 FT TO AVOID CLOUD BUILDUPS.
Narrative: CONDITIONS: MODERATE TURB. IN MAINTAINING VFR SEPARATION FROM CLOUD TOPS, IT WAS NECESSARY TO CRUISE AT 17800 FT FOR ABOUT 10 MINS. DURING THAT TIME, AN UPDRAFT FORCED US UP INTO CLASS A AIRSPACE MOMENTARILY. ESTIMATE FL180.2, ALTIMETER WAS SET AT 30.04 SO MAY NOT HAVE BEEN AT FL180 AT 29.92.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.