BE350 pilot had an altitude overshoot in atl class B airspace.

Attributes
ACN	519520
Time
Date	200107
Day	Sun
Place
Locale Reference	atc facility : a80.tracon
State Reference	GA
Altitude	msl bound lower : 3000 msl bound upper : 3400
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Super King Air 350
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Experience	flight time last 90 days : 45 flight time total : 10700 flight time type : 400
ASRS Report	519520
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : published procedure non adherence : clearance non adherence : far
Resolutory Action	flight crew : returned to assigned altitude none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On jul/thu/01, I picked up our aircraft from maintenance after autoplt/FMS work. On climb out, aircraft was climbing at 2500 FPM to 3000 ft MSL. The autoplt was on with the altitude selected and armed for 3000 ft. While I was asking the copilot about vectors for WX and listening to atl departure getting stepped on by other pilots like us trying to climb, aircraft flew through 3000 ft MSL. The autoplt and altitude hold command did not capture. By the time I disconnected the autoplt and manually leveled the aircraft, I had deviated the assigned altitude by +400 ft. 'Never assume that the autoplt will do as commanded.' I, as the pilot, am still responsible for flying the airplane.

Original NASA ASRS Text

Title: BE350 PLT HAD AN ALT OVERSHOOT IN ATL CLASS B AIRSPACE.

Narrative: ON JUL/THU/01, I PICKED UP OUR ACFT FROM MAINT AFTER AUTOPLT/FMS WORK. ON CLBOUT, ACFT WAS CLBING AT 2500 FPM TO 3000 FT MSL. THE AUTOPLT WAS ON WITH THE ALT SELECTED AND ARMED FOR 3000 FT. WHILE I WAS ASKING THE COPLT ABOUT VECTORS FOR WX AND LISTENING TO ATL DEP GETTING STEPPED ON BY OTHER PLTS LIKE US TRYING TO CLB, ACFT FLEW THROUGH 3000 FT MSL. THE AUTOPLT AND ALT HOLD COMMAND DID NOT CAPTURE. BY THE TIME I DISCONNECTED THE AUTOPLT AND MANUALLY LEVELED THE ACFT, I HAD DEVIATED THE ASSIGNED ALT BY +400 FT. 'NEVER ASSUME THAT THE AUTOPLT WILL DO AS COMMANDED.' I, AS THE PLT, AM STILL RESPONSIBLE FOR FLYING THE AIRPLANE.

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.