DC10 climbed 400 ft when autoplt was disconnected.

Attributes
ACN	431700
Time
Date	199903
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : msp.airport
State Reference	MN
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zmp.artcc
Operator	common carrier : air carrier
Make Model Name	DC-10 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	arrival star : kaspr
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 30 flight time total : 11000 flight time type : 300
ASRS Report	431700
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : far other anomaly
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	aircraft : equipment problem dissipated controller : issued advisory flight crew : regained aircraft control
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Aircraft deviated +300 ft after autoplt disconnected just prior to descent. ATC advised we appeared 300 ft high after the deviation was corrected. We responded 'roger.' the autoplt was disconnected intentionally, but it was out of trim and caused a pitching moment after it was disconnected that I did not adequately anticipate.

Original NASA ASRS Text

Title: DC10 CLBED 400 FT WHEN AUTOPLT WAS DISCONNECTED.

Narrative: ACFT DEVIATED +300 FT AFTER AUTOPLT DISCONNECTED JUST PRIOR TO DSCNT. ATC ADVISED WE APPEARED 300 FT HIGH AFTER THE DEV WAS CORRECTED. WE RESPONDED 'ROGER.' THE AUTOPLT WAS DISCONNECTED INTENTIONALLY, BUT IT WAS OUT OF TRIM AND CAUSED A PITCHING MOMENT AFTER IT WAS DISCONNECTED THAT I DID NOT ADEQUATELY ANTICIPATE.

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.