The flight crew descended 1000 ft through their assigned altitude.

Attributes
ACN	296133
Time
Date	199502
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : sbn
State Reference	IN
Altitude	msl bound lower : 15000 msl bound upper : 16000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other enroute airway : zau
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : flight engineer pilot : cfi pilot : instrument pilot : atp
Experience	flight time last 90 days : 200 flight time total : 17000 flight time type : 800
ASRS Report	296133
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared to descend to 16000 ft, altimeter 29.48. I set 29.48 on my altimeter and captain set 30.48. Aircraft leveled at 16000 ft on captain's altimeter and 15000 ft on first officer altimeter. Altitude had been set and agreed to and altitude selector and altimeter had been agreed to as 29.48 but crew was busy and never crosschecked altimeter settings and checklist (descent) was not completed.

Original NASA ASRS Text

Title: THE FLC DSNDED 1000 FT THROUGH THEIR ASSIGNED ALT.

Narrative: CLRED TO DSND TO 16000 FT, ALTIMETER 29.48. I SET 29.48 ON MY ALTIMETER AND CAPT SET 30.48. ACFT LEVELED AT 16000 FT ON CAPT'S ALTIMETER AND 15000 FT ON FO ALTIMETER. ALT HAD BEEN SET AND AGREED TO AND ALT SELECTOR AND ALTIMETER HAD BEEN AGREED TO AS 29.48 BUT CREW WAS BUSY AND NEVER XCHKED ALTIMETER SETTINGS AND CHKLIST (DSCNT) WAS NOT COMPLETED.

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.