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Pilot of light aircraft encounters heavy turbulence in vicinity of thunderstorm and experiences near loss of control.
| Attributes | |
| ACN | 118155 |
| Time | |
| Date | 198907 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : aco |
| State Reference | OH |
| Altitude | msl bound lower : 8400 msl bound upper : 9800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft |
| Flight Phase | cruise other |
| Route In Use | enroute airway : cle |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 50 flight time total : 2900 flight time type : 1500 |
| ASRS Report | 118155 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : regained aircraft control flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
I was flying level with my stormscope working, talking to cle approach, when west/O warning from my stormscope or the controller I experienced a sudden increase in the altitude of the airplane (800') and very heavy rain and heavy lightning. I at once grabbed the carburetor heat and the throttle. Suddenly the airplane started to descend and I lost about 1200' down to about 8400' MSL. I added power and climbed to assigned 9000' and leveled off ok. The controller didn't say anything but this was a serious altitude excursion.
Original NASA ASRS Text
Title: PLT OF LIGHT ACFT ENCOUNTERS HEAVY TURBULENCE IN VICINITY OF TSTM AND EXPERIENCES NEAR LOSS OF CONTROL.
Narrative: I WAS FLYING LEVEL WITH MY STORMSCOPE WORKING, TALKING TO CLE APCH, WHEN W/O WARNING FROM MY STORMSCOPE OR THE CTLR I EXPERIENCED A SUDDEN INCREASE IN THE ALT OF THE AIRPLANE (800') AND VERY HEAVY RAIN AND HEAVY LIGHTNING. I AT ONCE GRABBED THE CARB HEAT AND THE THROTTLE. SUDDENLY THE AIRPLANE STARTED TO DSND AND I LOST ABOUT 1200' DOWN TO ABOUT 8400' MSL. I ADDED PWR AND CLBED TO ASSIGNED 9000' AND LEVELED OFF OK. THE CTLR DIDN'T SAY ANYTHING BUT THIS WAS A SERIOUS ALT EXCURSION.
Data retrieved from NASA's ASRS site as of August 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.