Narrative:

During descent into ord we were given several airspeed requests with the final request being 300 KTS. Descending out of 10500 ft we were given a runway change with a possible lahso which required looking up runway landing data and changing the mcdu. We began setting up for the runway change and lahso landing data when we realized that we had descended through 10000 ft at approximately 300 KTS. We stopped the descent by 9500 ft and reduced the airspeed to 250 KTS. The high workload was a contributing factor to our airspeed excursion.

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Original NASA ASRS Text

Title: DISTRACTIONS DUE TO AMENDED ATC CLRNCS RESULT IN SPEED DEVIATION BELOW 10000 FT FOR A319 FLT CREW.

Narrative: DURING DSCNT INTO ORD WE WERE GIVEN SEVERAL AIRSPD REQUESTS WITH THE FINAL REQUEST BEING 300 KTS. DSNDING OUT OF 10500 FT WE WERE GIVEN A RWY CHANGE WITH A POSSIBLE LAHSO WHICH REQUIRED LOOKING UP RWY LNDG DATA AND CHANGING THE MCDU. WE BEGAN SETTING UP FOR THE RWY CHANGE AND LAHSO LNDG DATA WHEN WE REALIZED THAT WE HAD DSNDED THROUGH 10000 FT AT APPROX 300 KTS. WE STOPPED THE DSCNT BY 9500 FT AND REDUCED THE AIRSPD TO 250 KTS. THE HIGH WORKLOAD WAS A CONTRIBUTING FACTOR TO OUR AIRSPD EXCURSION.

Data retrieved from NASA's ASRS site as of January 2009 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.