Narrative:

Cleared to FL350. Just before vocal warning I saw us slowly climbing at 35300'. Disconnected the autoplt and pushed it back down to FL350 picking up some buffeting during the speed build-up. We made the standard call at 1000' and checked that the autoplt was armed for capture at FL350. I've been doing better. It's been 10 months or so since I've had to send one of these in. I've prevented this from happening at lest 6 times since my last report. Of course by now I'm sure you know this is an medium large transport aircraft. West/O a doubt, there is a problem with the altitude capturing capability of this aircraft's autoplt. Why won't something be done before someone gets hurt? Thanks for helping as much as you can.

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Original NASA ASRS Text

Title: ALT DEVIATION. OVERSHOOT IN CLIMB.

Narrative: CLRED TO FL350. JUST BEFORE VOCAL WARNING I SAW US SLOWLY CLBING AT 35300'. DISCONNECTED THE AUTOPLT AND PUSHED IT BACK DOWN TO FL350 PICKING UP SOME BUFFETING DURING THE SPD BUILD-UP. WE MADE THE STANDARD CALL AT 1000' AND CHKED THAT THE AUTOPLT WAS ARMED FOR CAPTURE AT FL350. I'VE BEEN DOING BETTER. IT'S BEEN 10 MONTHS OR SO SINCE I'VE HAD TO SEND ONE OF THESE IN. I'VE PREVENTED THIS FROM HAPPENING AT LEST 6 TIMES SINCE MY LAST RPT. OF COURSE BY NOW I'M SURE YOU KNOW THIS IS AN MLG ACFT. W/O A DOUBT, THERE IS A PROB WITH THE ALT CAPTURING CAPABILITY OF THIS ACFT'S AUTOPLT. WHY WON'T SOMETHING BE DONE BEFORE SOMEONE GETS HURT? THANKS FOR HELPING AS MUCH AS YOU CAN.

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.