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Altitude excursion occurs during a temporary loss of aircraft control as an IFR PA23 aztec pilot accepts a vector off course to avoid an MOA and flies into a buildup, on frequency with ZKC, mo.
| Attributes | |
| ACN | 555941 |
| Time | |
| Date | 200208 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : shy.vor |
| State Reference | MO |
| Altitude | msl bound lower : 10000 msl bound upper : 10500 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc.artcc tower : lou.tower |
| Operator | general aviation : personal |
| Make Model Name | PA-23-250 Aztec |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : cfi pilot : commercial pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 50 flight time total : 1400 flight time type : 75 |
| ASRS Report | 555941 |
| Person 2 | |
| Function | observation : passenger |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather inflight encounter : turbulence inflight encounter other other anomaly other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued advisory flight crew : returned to assigned altitude flight crew : regained aircraft control |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Weather Flight Crew Human Performance Airspace Structure ATC Human Performance |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
I was cruising at 10000 ft in a scattered layer of cumulus clouds with bases at about 8000 ft and tops greater than 12000 ft. Cloud spacing was such that IMC was easily avoided by requesting minor deviations from time-to-time. We were at one point vectored into a cumulus build-up to 'avoid restr airspace.' upon entering build-up, thermal activity took us to about 10500 ft in severe turbulence. Altitude was restored to 10000 ft within less than 1 min. Controller noted altitude bust before I was able to report the situation, as my attention was focused on controling the aircraft.
Original NASA ASRS Text
Title: ALT EXCURSION OCCURS DURING A TEMPORARY LOSS OF ACFT CTL AS AN IFR PA23 AZTEC PLT ACCEPTS A VECTOR OFF COURSE TO AVOID AN MOA AND FLIES INTO A BUILDUP, ON FREQ WITH ZKC, MO.
Narrative: I WAS CRUISING AT 10000 FT IN A SCATTERED LAYER OF CUMULUS CLOUDS WITH BASES AT ABOUT 8000 FT AND TOPS GREATER THAN 12000 FT. CLOUD SPACING WAS SUCH THAT IMC WAS EASILY AVOIDED BY REQUESTING MINOR DEVS FROM TIME-TO-TIME. WE WERE AT ONE POINT VECTORED INTO A CUMULUS BUILD-UP TO 'AVOID RESTR AIRSPACE.' UPON ENTERING BUILD-UP, THERMAL ACTIVITY TOOK US TO ABOUT 10500 FT IN SEVERE TURB. ALT WAS RESTORED TO 10000 FT WITHIN LESS THAN 1 MIN. CTLR NOTED ALT BUST BEFORE I WAS ABLE TO RPT THE SIT, AS MY ATTN WAS FOCUSED ON CTLING THE ACFT.
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.