A DA10 flacon climbs above its assigned altitude in ZAU airspace.

Attributes
ACN	379090
Time
Date	199709
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : dbq
State Reference	IA
Altitude	msl bound lower : 27000 msl bound upper : 27000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	general aviation : corporate
Make Model Name	Falcon 20FJF/20C/20D/20E/20F
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 60 flight time total : 3500 flight time type : 2100
ASRS Report	379090
Person 2
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : overshoot inflight encounter : weather non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While climbing on the autoplt to FL270, was with a new first officer and working radar around WX. The autoplt captured altitude. I glanced at the green altitude capture and continued to work radar through storms. The autoplt started climbing and I didn't notice until the 300 ft horn went off. ATC asked our altitude and we stated leveling at FL270. Greater attention to altitude and we will have the autoplt fixed.

Original NASA ASRS Text

Title: A DA10 FLACON CLBS ABOVE ITS ASSIGNED ALT IN ZAU AIRSPACE.

Narrative: WHILE CLBING ON THE AUTOPLT TO FL270, WAS WITH A NEW FO AND WORKING RADAR AROUND WX. THE AUTOPLT CAPTURED ALT. I GLANCED AT THE GREEN ALT CAPTURE AND CONTINUED TO WORK RADAR THROUGH STORMS. THE AUTOPLT STARTED CLBING AND I DIDN'T NOTICE UNTIL THE 300 FT HORN WENT OFF. ATC ASKED OUR ALT AND WE STATED LEVELING AT FL270. GREATER ATTN TO ALT AND WE WILL HAVE THE AUTOPLT FIXED.

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.