Large transport flight crew overshoots clearance altitude on descent.

Attributes
ACN	119369
Time
Date	198907
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ord
State Reference	IL
Altitude	msl bound lower : 11600 msl bound upper : 12000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 12400 flight time type : 3800
ASRS Report	119369
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : clearance other anomaly
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flight was cleared to 12000'. First officer was flying aircraft and was turning to avoid build-ups and turning direct to ord VOR. Altitude was stopped at 11600 or 11700'. Altitude alert worked.

Original NASA ASRS Text

Title: LGT FLT CREW OVERSHOOTS CLRNC ALT ON DESCENT.

Narrative: FLT WAS CLRED TO 12000'. F/O WAS FLYING ACFT AND WAS TURNING TO AVOID BUILD-UPS AND TURNING DIRECT TO ORD VOR. ALT WAS STOPPED AT 11600 OR 11700'. ALT ALERT WORKED.

Data retrieved from NASA's ASRS site as of August 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.