Narrative:

Approach control cleared me to descend to 6000 ft. I thought he said 3000 ft and read back 3000 ft and descended to 3000 ft. It was called to my attention that I was at the wrong altitude. Just a misunderstanding on my part.

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Original NASA ASRS Text

Title: PLT INSTRUCTED BY ATC TO DSND TO 6000 FT AND INCORRECTLY DSNDS TO 3000 FT.

Narrative: APCH CTL CLRED ME TO DSND TO 6000 FT. I THOUGHT HE SAID 3000 FT AND READ BACK 3000 FT AND DSNDED TO 3000 FT. IT WAS CALLED TO MY ATTN THAT I WAS AT THE WRONG ALT. JUST A MISUNDERSTANDING ON MY PART.

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.