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Captain of an air carrier medium large transport lost control momentarily and climbed above assigned altitude due to thunderstorms, turbulence.
| Attributes | |
| ACN | 273231 |
| Time | |
| Date | 199405 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : cle |
| State Reference | OH |
| Altitude | msl bound lower : 10900 msl bound upper : 11350 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : cle tower : oma |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 175 flight time total : 10000 flight time type : 900 |
| ASRS Report | 273231 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other anomaly other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : exited adverse environment 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:
On departure from cleveland with large thunderstorms in area we were on a vector to avoid the WX. ZOB asked when we could take a heading to the south. We informed the controller that it would be about 30 NM. We asked for a further turn to the north to avoid more WX. The controller then wanted us to again turn south, which would have put us right in the heaviest returns. We again told him we could not. As this was all going on and we were evaluating the radar we entered some clouds that were not showing big returns. I was about 125 ft higher than our assigned 11000 ft when we entered the clouds. These clouds gave us a lifting action. I tried to descend smoothly, but as I kept pushing down on yoke we continued to climb quickly with a then downward force causing us to level at 10900 ft. Before the aircraft descended we climbed to approximately 11350 ft. The controller told us to maintain 11000 ft and we answered that we were at 11000 ft because at that time we were within 100 ft. This all happened in a very short period of time. The controller never said another thing about this.
Original NASA ASRS Text
Title: CAPT OF AN ACR MLG LOST CTL MOMENTARILY AND CLBED ABOVE ASSIGNED ALT DUE TO TSTMS, TURB.
Narrative: ON DEP FROM CLEVELAND WITH LARGE TSTMS IN AREA WE WERE ON A VECTOR TO AVOID THE WX. ZOB ASKED WHEN WE COULD TAKE A HDG TO THE S. WE INFORMED THE CTLR THAT IT WOULD BE ABOUT 30 NM. WE ASKED FOR A FURTHER TURN TO THE N TO AVOID MORE WX. THE CTLR THEN WANTED US TO AGAIN TURN S, WHICH WOULD HAVE PUT US RIGHT IN THE HEAVIEST RETURNS. WE AGAIN TOLD HIM WE COULD NOT. AS THIS WAS ALL GOING ON AND WE WERE EVALUATING THE RADAR WE ENTERED SOME CLOUDS THAT WERE NOT SHOWING BIG RETURNS. I WAS ABOUT 125 FT HIGHER THAN OUR ASSIGNED 11000 FT WHEN WE ENTERED THE CLOUDS. THESE CLOUDS GAVE US A LIFTING ACTION. I TRIED TO DSND SMOOTHLY, BUT AS I KEPT PUSHING DOWN ON YOKE WE CONTINUED TO CLB QUICKLY WITH A THEN DOWNWARD FORCE CAUSING US TO LEVEL AT 10900 FT. BEFORE THE ACFT DSNDED WE CLBED TO APPROX 11350 FT. THE CTLR TOLD US TO MAINTAIN 11000 FT AND WE ANSWERED THAT WE WERE AT 11000 FT BECAUSE AT THAT TIME WE WERE WITHIN 100 FT. THIS ALL HAPPENED IN A VERY SHORT PERIOD OF TIME. THE CTLR NEVER SAID ANOTHER THING ABOUT THIS.
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.