Narrative:

In cruise at FL290 crossing over the front range of the rockies just north of denver. Desire climb for fuel conservation and inquire with denver center about rides at FL310. Rides reported good and subsequently given climb to FL310. Climbing out of FL305 encountered severe mountain wave turbulence causing immediate airspeed increase above limits and uncontrollable climb. Disconnected autopilot and attempted immediate correction. Topped out at FL330; then corrected back to FL310. Reported event to ATC; dispatch; and maintenance control with aircraft maintenance log (aml) write up.

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Original NASA ASRS Text

Title: Airbus Captain reported encountering a mountain wave during a climb from FL290 which oversped the aircraft during an uncontrollable climb to FL330.

Narrative: In cruise at FL290 crossing over the front range of the Rockies just north of Denver. Desire climb for fuel conservation and inquire with Denver Center about rides at FL310. Rides reported good and subsequently given climb to FL310. Climbing out of FL305 encountered severe mountain wave turbulence causing immediate airspeed increase above limits and uncontrollable climb. Disconnected autopilot and attempted immediate correction. Topped out at FL330; then corrected back to FL310. Reported event to ATC; Dispatch; and Maintenance Control with Aircraft Maintenance Log (AML) write up.

Data retrieved from NASA's ASRS site 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.