Air carrier X wrong altimeter setting descended below assigned altitude. Pilot deviation.

Attributes
ACN	287164
Time
Date	199411
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ard
State Reference	PA
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent other
Route In Use	arrival other enroute airway : zny
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 : 20000 flight time type : 5000
ASRS Report	287164
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X on descent to sounto intersection (10 NM south of yardley VOR on the 243 radial) cleared to cross at 11000 ft MSL. Incorrectly copied altimeter setting as 30.41. On level off asked by controller what our altitude was: that we were showing level at 10000 ft. Discovered incorrect altimeter setting was 29.41. No conflict was indicated. I think we read back 30.41 and the readback was not caught as incorrect.

Original NASA ASRS Text

Title: ACR X WRONG ALTIMETER SETTING DSNDED BELOW ASSIGNED ALT. PLTDEV.

Narrative: ACR X ON DSCNT TO SOUNTO INTXN (10 NM S OF YARDLEY VOR ON THE 243 RADIAL) CLRED TO CROSS AT 11000 FT MSL. INCORRECTLY COPIED ALTIMETER SETTING AS 30.41. ON LEVEL OFF ASKED BY CTLR WHAT OUR ALT WAS: THAT WE WERE SHOWING LEVEL AT 10000 FT. DISCOVERED INCORRECT ALTIMETER SETTING WAS 29.41. NO CONFLICT WAS INDICATED. I THINK WE READ BACK 30.41 AND THE READBACK WAS NOT CAUGHT AS INCORRECT.

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.