Narrative:

Performing routine step-climb out of O'hare wbound to den, copilot flying. Aircraft was light weight and climb performance correspondingly good -- both conditions that first officer did not usually experience during his typical international schedule/experience. I was momentarily 'head down' programming ACARS and changing radio frequencys. Heard altitude alert and observed first officer responding (hand flying). We overshot 13000 ft leveloff, reaching maximum of 13500 ft, and corrected back immediately. We were questioned by alert controller during corrective maneuver.

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Original NASA ASRS Text

Title: ALT OVERSHOOT DEPARTING CHICAGO IN A HIGH PERFORMANCE LIGHT WT B777.

Narrative: PERFORMING ROUTINE STEP-CLB OUT OF O'HARE WBOUND TO DEN, COPLT FLYING. ACFT WAS LIGHT WT AND CLB PERFORMANCE CORRESPONDINGLY GOOD -- BOTH CONDITIONS THAT FO DID NOT USUALLY EXPERIENCE DURING HIS TYPICAL INTL SCHEDULE/EXPERIENCE. I WAS MOMENTARILY 'HEAD DOWN' PROGRAMMING ACARS AND CHANGING RADIO FREQS. HEARD ALT ALERT AND OBSERVED FO RESPONDING (HAND FLYING). WE OVERSHOT 13000 FT LEVELOFF, REACHING MAX OF 13500 FT, AND CORRECTED BACK IMMEDIATELY. WE WERE QUESTIONED BY ALERT CTLR DURING CORRECTIVE MANEUVER.

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.