MD80 flight crew overshoot assigned altitude caused by incorrect altimeter setting.

Attributes
ACN	499600
Time
Date	200101
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : stl.airport
State Reference	MO
Altitude	msl bound lower : 10300 msl bound upper : 11300
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : t75.tracon tower : pdk.tower
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 8000 flight time type : 900
ASRS Report	499600
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : clearance
Independent Detector	atc equipment other atc equipment : radar other controllera
Resolutory Action	controller : issued advisory controller : issued new clearance flight crew : returned to original clearance
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared by approach to descend to 11000 ft. At 11300 ft, controller asked us to verify altitude. We reported leveling at 11000 ft. Controller readout indicated 10300 ft. Controller advised us to stop squawk. About 30 seconds later, controller advised us to check altimeter (at current setting) and turn transponder back on. Controller stated readout now appeared normal.

Original NASA ASRS Text

Title: MD80 FLC OVERSHOOT ASSIGNED ALT CAUSED BY INCORRECT ALTIMETER SETTING.

Narrative: CLRED BY APCH TO DSND TO 11000 FT. AT 11300 FT, CTLR ASKED US TO VERIFY ALT. WE RPTED LEVELING AT 11000 FT. CTLR READOUT INDICATED 10300 FT. CTLR ADVISED US TO STOP SQUAWK. ABOUT 30 SECONDS LATER, CTLR ADVISED US TO CHK ALTIMETER (AT CURRENT SETTING) AND TURN XPONDER BACK ON. CTLR STATED READOUT NOW APPEARED NORMAL.

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.