B757-200 crew lost 300 ft when they disengaged the autoplt.

Attributes
ACN	513840
Time
Date	200106
Day	Fri
Place
Locale Reference	atc facility : m98.tracon
State Reference	MN
Altitude	msl bound lower : 3700 msl bound upper : 4000
Environment
Flight Conditions	IMC
Light	Dusk
Aircraft 1
Controlling Facilities	tower : ind.tower
Operator	common carrier : air carrier
Make Model Name	B757-200
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 10000
ASRS Report	513840
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : published procedure non adherence : far non adherence : company policies non adherence : clearance
Resolutory Action	flight crew : returned to assigned altitude none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Due to spacing on approach, aircraft was broken out and vectored downwind. Aircraft lost about 300 ft from assigned altitude of 4000 ft during transition from autoplt to manual.

Original NASA ASRS Text

Title: B757-200 CREW LOST 300 FT WHEN THEY DISENGAGED THE AUTOPLT.

Narrative: DUE TO SPACING ON APCH, ACFT WAS BROKEN OUT AND VECTORED DOWNWIND. ACFT LOST ABOUT 300 FT FROM ASSIGNED ALT OF 4000 FT DURING TRANSITION FROM AUTOPLT TO MANUAL.

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.