B727 crew had altitude overshoot in ZTL class a airspace.

Attributes
ACN	470400
Time
Date	200004
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : atl.airport
State Reference	GA
Altitude	msl bound lower : 19000 msl bound upper : 19500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl.artcc tracon : mlu.tracon
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time type : 250
ASRS Report	470400
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : published procedure non adherence : clearance
Independent Detector	other flight crewa other flight crewb other other : 3
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:

Captain discontinued use of autoplt during climb due to somewhat erratic operation during a turn using the heading bug. When selected heading was armed, autoplt was apparently re-engaged but altitude select was not rearmed. Assigned altitude was FL190 and climb was stopped at FL195 and returned to FL190 wi no further disparity.

Original NASA ASRS Text

Title: B727 CREW HAD ALT OVERSHOOT IN ZTL CLASS A AIRSPACE.

Narrative: CAPT DISCONTINUED USE OF AUTOPLT DURING CLB DUE TO SOMEWHAT ERRATIC OP DURING A TURN USING THE HDG BUG. WHEN SELECTED HDG WAS ARMED, AUTOPLT WAS APPARENTLY RE-ENGAGED BUT ALT SELECT WAS NOT REARMED. ASSIGNED ALT WAS FL190 AND CLB WAS STOPPED AT FL195 AND RETURNED TO FL190 WI NO FURTHER DISPARITY.

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.