Narrative:

Descending on the arrival, we were told to maintain 11000 ft with an altimeter of 29.32. I dialed 30.32 inches resulting in a leveloff at 11000 ft indicated, but 10000 ft MSL. The PNF was distraction by a passenger moving around the cabin while the seatbelt sign was on. At leveloff, ATC questioned our altitude. We said 11000 ft. He said, 'no you are at 10000 ft, maintain 10000 ft.' I noticed the right side altimeter was set to 29.32 inches and questioned the PNF. He said 29.32 was the correct setting so I reset my altimeter. The error was not noticed on descent due to the distraction. The next instrument check was not on the checklist until the approach check. The error would have been found then.

Google
 

Original NASA ASRS Text

Title: DA50 SET WRONG ALTIMETER SETTING DSNDING INTO MSP CAUSING AN OVERSHOOT. ALTDEV.

Narrative: DSNDING ON THE ARR, WE WERE TOLD TO MAINTAIN 11000 FT WITH AN ALTIMETER OF 29.32. I DIALED 30.32 INCHES RESULTING IN A LEVELOFF AT 11000 FT INDICATED, BUT 10000 FT MSL. THE PNF WAS DISTR BY A PAX MOVING AROUND THE CABIN WHILE THE SEATBELT SIGN WAS ON. AT LEVELOFF, ATC QUESTIONED OUR ALT. WE SAID 11000 FT. HE SAID, 'NO YOU ARE AT 10000 FT, MAINTAIN 10000 FT.' I NOTICED THE R SIDE ALTIMETER WAS SET TO 29.32 INCHES AND QUESTIONED THE PNF. HE SAID 29.32 WAS THE CORRECT SETTING SO I RESET MY ALTIMETER. THE ERROR WAS NOT NOTICED ON DSCNT DUE TO THE DISTR. THE NEXT INST CHK WAS NOT ON THE CHKLIST UNTIL THE APCH CHK. THE ERROR WOULD HAVE BEEN FOUND THEN.

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.