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Updrafts and severe turbulence encountered which carried aircraft 1200' above assigned altitude. SIGMET issued just prior to incident regarding icing.
| Attributes | |
| ACN | 108312 |
| Time | |
| Date | 198904 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dqn |
| State Reference | OH |
| Altitude | msl bound lower : 11000 msl bound upper : 12500 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private pilot : instrument |
| Experience | flight time last 90 days : 120 flight time total : 10000 |
| ASRS Report | 108312 |
| 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 other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Before the flight I received WX briefing. I was told light icing south of route. Pilot reports indicated 'trace of ice'. Leaving effingham, il, and climbing to 11,000', total instruments -- no sign of ice. Between dayton and columbus I met severe turbulence and severe icing. I entered an updraft shaft that took my aircraft 1200' above assigned altitude. Pulling the manifold pressure to 15' and lowering my nose I still continued going up the shaft. Minutes prior to incident center issued a SIGMET 1 regarding icing. After incident center asked my assigned altitude. I replied '11,000' but I was doing all I could to hold aircraft under control.'
Original NASA ASRS Text
Title: UPDRAFTS AND SEVERE TURBULENCE ENCOUNTERED WHICH CARRIED ACFT 1200' ABOVE ASSIGNED ALT. SIGMET ISSUED JUST PRIOR TO INCIDENT REGARDING ICING.
Narrative: BEFORE THE FLT I RECEIVED WX BRIEFING. I WAS TOLD LIGHT ICING SOUTH OF ROUTE. PLT REPORTS INDICATED 'TRACE OF ICE'. LEAVING EFFINGHAM, IL, AND CLIMBING TO 11,000', TOTAL INSTRUMENTS -- NO SIGN OF ICE. BETWEEN DAYTON AND COLUMBUS I MET SEVERE TURB AND SEVERE ICING. I ENTERED AN UPDRAFT SHAFT THAT TOOK MY ACFT 1200' ABOVE ASSIGNED ALT. PULLING THE MANIFOLD PRESSURE TO 15' AND LOWERING MY NOSE I STILL CONTINUED GOING UP THE SHAFT. MINUTES PRIOR TO INCIDENT CENTER ISSUED A SIGMET 1 REGARDING ICING. AFTER INCIDENT CENTER ASKED MY ASSIGNED ALT. I REPLIED '11,000' BUT I WAS DOING ALL I COULD TO HOLD ACFT UNDER CONTROL.'
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.