Temporary loss of aircraft control in air carrier medium large transport.

Attributes
ACN	272209
Time
Date	199405
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : buf
State Reference	NY
Altitude	msl bound lower : 33800 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob tower : pvd
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time total : 10000
ASRS Report	272209
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical altitude deviation : undershoot non adherence : clearance other anomaly other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

On a climb to FL35O, passing FL338, center gave a small heading change. The autoplt on rolling out on assigned heading started to 'dutch roll' with an accompanying airspeed loss. Power was added, autoplt disengaged and climb was stopped. Center was notified that aircraft was leveling at FL330.

Original NASA ASRS Text

Title: TEMPORARY LOSS OF ACFT CTL IN ACR MLG.

Narrative: ON A CLB TO FL35O, PASSING FL338, CTR GAVE A SMALL HDG CHANGE. THE AUTOPLT ON ROLLING OUT ON ASSIGNED HDG STARTED TO 'DUTCH ROLL' WITH AN ACCOMPANYING AIRSPD LOSS. PWR WAS ADDED, AUTOPLT DISENGAGED AND CLB WAS STOPPED. CTR WAS NOTIFIED THAT ACFT WAS LEVELING AT FL330.

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.