Narrative:

After flying a test flight for maintenance we were on base leg for runway 18R when company sent an ACARS message asking if we had enough fuel to take the aircraft to tulsa. I immediately asked approach control for clearance to tulsa and they immediately gave a vector of 340 degrees and a climb to 6000 ft. At the time we were around 4000 ft and descending and an approximately heading of 090 degrees. I made the turn and began a climb while the first officer was talking to company etc. The autoplt was still on but it failed to level at 6000 ft. I caught it at 6300 ft and disengaged the autoplt and began descending back to 6000 ft. Approach control then cleared us to 10000 ft -- saying nothing about our overshoot.

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Original NASA ASRS Text

Title: ALTDEV ALT OVERSHOT. ACR FLC CLBED THROUGH ITS CLRED ALT WHEN THE ALT CAPTURE MODE OF THE AUTOPLT FAILED TO FUNCTION AS DESIGNED.

Narrative: AFTER FLYING A TEST FLT FOR MAINT WE WERE ON BASE LEG FOR RWY 18R WHEN COMPANY SENT AN ACARS MESSAGE ASKING IF WE HAD ENOUGH FUEL TO TAKE THE ACFT TO TULSA. I IMMEDIATELY ASKED APCH CTL FOR CLRNC TO TULSA AND THEY IMMEDIATELY GAVE A VECTOR OF 340 DEGS AND A CLB TO 6000 FT. AT THE TIME WE WERE AROUND 4000 FT AND DSNDING AND AN APPROX HDG OF 090 DEGS. I MADE THE TURN AND BEGAN A CLB WHILE THE FO WAS TALKING TO COMPANY ETC. THE AUTOPLT WAS STILL ON BUT IT FAILED TO LEVEL AT 6000 FT. I CAUGHT IT AT 6300 FT AND DISENGAGED THE AUTOPLT AND BEGAN DSNDING BACK TO 6000 FT. APCH CTL THEN CLRED US TO 10000 FT -- SAYING NOTHING ABOUT OUR OVERSHOOT.

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.