Narrative:

First officer was PF on a tower-to-tower IFR flight from cos to den. Cleared to 14000 ft cruise, we were climbing around heavy buildups, experiencing moderate turbulence and deviating around the bigger buildups. Climbing through 13000 ft I said '1 to go,' heard the altitude alert and proceeded to enter some data on the ACARS. With my head down, I heard the altitude alert again, looked up and saw us climbing through 14300 ft. At the same time the first officer recognized the overshoot and arrested the climb by 14500 ft and began an immediate descent back to 14000 ft. ATC then told us to maintain 14000 ft and switch to den approach. Time of deviation was about 20 seconds.

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Original NASA ASRS Text

Title: ALTDEV ALT OVERSHOT. ACR CLBS ABOVE ITS ASSIGNED ALT, BUT THE ALT ALERTER, THE OTHER PLT AND THE DEP CTLR CORRECT THE SIT.

Narrative: FO WAS PF ON A TWR-TO-TWR IFR FLT FROM COS TO DEN. CLRED TO 14000 FT CRUISE, WE WERE CLBING AROUND HVY BUILDUPS, EXPERIENCING MODERATE TURB AND DEVIATING AROUND THE BIGGER BUILDUPS. CLBING THROUGH 13000 FT I SAID '1 TO GO,' HEARD THE ALT ALERT AND PROCEEDED TO ENTER SOME DATA ON THE ACARS. WITH MY HEAD DOWN, I HEARD THE ALT ALERT AGAIN, LOOKED UP AND SAW US CLBING THROUGH 14300 FT. AT THE SAME TIME THE FO RECOGNIZED THE OVERSHOOT AND ARRESTED THE CLB BY 14500 FT AND BEGAN AN IMMEDIATE DSCNT BACK TO 14000 FT. ATC THEN TOLD US TO MAINTAIN 14000 FT AND SWITCH TO DEN APCH. TIME OF DEV WAS ABOUT 20 SECONDS.

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.