A cessna citation flight crew climbed above assigned atl near lfk.

Attributes
ACN	446730
Time
Date	199908
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : lfk.vortac
State Reference	TX
Altitude	msl bound lower : 12000 msl bound upper : 12300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zhu.artcc
Operator	general aviation : corporate
Make Model Name	Citation I
Operating Under FAR Part	Part 91
Navigation In Use	other vortac
Flight Phase	cruise : level
Route In Use	enroute other
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 7000 flight time type : 600
ASRS Report	446730
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to assigned altitude
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Assigned altitude 12000 ft. New copilot, flying, inadvertently disengaged autoplt. Altitude gain was 200-300 ft before corrected. No ATC comment.

Original NASA ASRS Text

Title: A CESSNA CITATION FLC CLBED ABOVE ASSIGNED ATL NEAR LFK.

Narrative: ASSIGNED ALT 12000 FT. NEW COPLT, FLYING, INADVERTENTLY DISENGAGED AUTOPLT. ALT GAIN WAS 200-300 FT BEFORE CORRECTED. NO ATC COMMENT.

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.