B727 crew had altitude deviation in ZMP class a.

Attributes
ACN	484360
Time
Date	200008
Day	Mon
Local Time Of Day	1201 To 1800
Place
State Reference	NE
Altitude	msl bound lower : 33000 msl bound upper : 33300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zmp.artcc tower : pit.tower
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : commercial pilot : atp pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 120 flight time total : 4300 flight time type : 100
ASRS Report	484360
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : company policies non adherence : clearance other anomaly other
Independent Detector	atc equipment other atc equipment : 928 aircraft equipment : altitude alert
Resolutory Action	controller : issued alert flight crew : returned to assigned altitude
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

With autoplt engaged aircraft climbed 300 ft. Advised of altitude deviation by center. Immediately returned to altitude.

Original NASA ASRS Text

Title: B727 CREW HAD ALTDEV IN ZMP CLASS A.

Narrative: WITH AUTOPLT ENGAGED ACFT CLBED 300 FT. ADVISED OF ALTDEV BY CTR. IMMEDIATELY RETURNED TO ALT.

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.