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Light twin engine aircraft flying in thunderstorm encounters heavy turbulence and strong updraft which leads to altitude deviation.
| Attributes | |
| ACN | 117711 |
| Time | |
| Date | 198907 |
| Place | |
| Locale Reference | atc facility : ckb |
| State Reference | WV |
| Altitude | msl bound lower : 6000 msl bound upper : 6300 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | general aviation : personal |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 100 flight time total : 4500 flight time type : 250 |
| ASRS Report | 117711 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : regained aircraft control flight crew : exited adverse environment |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While traveling wbound on an IFR flight plan to charleston, wv. Pilot encountered moderate severe turbulence in level ii thunderstorms activity while encountering strong updrafts. Center notified pilot of 300' altitude deviation; pilot reset transponder and recovered to assigned altitude in 8-10 seconds.
Original NASA ASRS Text
Title: LIGHT TWIN ENGINE ACFT FLYING IN TSTM ENCOUNTERS HEAVY TURB AND STRONG UPDRAFT WHICH LEADS TO ALT DEVIATION.
Narrative: WHILE TRAVELING WBOUND ON AN IFR FLT PLAN TO CHARLESTON, WV. PLT ENCOUNTERED MODERATE SEVERE TURB IN LEVEL II TSTMS ACTIVITY WHILE ENCOUNTERING STRONG UPDRAFTS. CENTER NOTIFIED PLT OF 300' ALT DEVIATION; PLT RESET XPONDER AND RECOVERED TO ASSIGNED ALT IN 8-10 SECS.
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.