An atx light transport overshot its assigned altitude during a descent procedure into bmi, il.

Attributes
ACN	420140
Time
Date	199811
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : bmi airport : bmi
State Reference	IL
Altitude	msl bound lower : 5650 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pia
Operator	general aviation : corporate
Make Model Name	Israel Aircraft Undifferentiated or Other Model
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 5400 flight time type : 1800
ASRS Report	420140
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : became reoriented
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared to descend to 6000 ft from our previous altitude, the altitude alerter went off and I caught the altitude about the same time. A 350 ft lower than cleared altitude resulted. At the time, there were or was no unnecessary talking in the cockpit. The awareness in the cockpit was relaxed and I believe that was a factor. In addition, the autoplt altitude select was on and failed to capture altitude. Lesson learned, within 1000 ft, all attention to the task at hand.

Original NASA ASRS Text

Title: AN ATX LTT OVERSHOT ITS ASSIGNED ALT DURING A DSCNT PROC INTO BMI, IL.

Narrative: CLRED TO DSND TO 6000 FT FROM OUR PREVIOUS ALT, THE ALT ALERTER WENT OFF AND I CAUGHT THE ALT ABOUT THE SAME TIME. A 350 FT LOWER THAN CLRED ALT RESULTED. AT THE TIME, THERE WERE OR WAS NO UNNECESSARY TALKING IN THE COCKPIT. THE AWARENESS IN THE COCKPIT WAS RELAXED AND I BELIEVE THAT WAS A FACTOR. IN ADDITION, THE AUTOPLT ALT SELECT WAS ON AND FAILED TO CAPTURE ALT. LESSON LEARNED, WITHIN 1000 FT, ALL ATTN TO THE TASK AT HAND.

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.