A C340A pilot reports an aircraft equipment problem runaway trim in an unspecified axis.

Attributes
ACN	359550
Time
Date	199702
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lit
State Reference	AR
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lit
Operator	general aviation : personal
Make Model Name	Cessna 340/340A
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 60 flight time total : 2200 flight time type : 250
ASRS Report	359550
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Runaway electric trim in VMC. Unable to comply with ATC instructions, ie, altitude and heading until problem diagnosed and solved, approximately 40 seconds. Pulled circuit breaker for trim. This should be stressed heavily in instrument training.

Original NASA ASRS Text

Title: A C340A PLT RPTS AN ACFT EQUIP PROB RUNAWAY TRIM IN AN UNSPECIFIED AXIS.

Narrative: RUNAWAY ELECTRIC TRIM IN VMC. UNABLE TO COMPLY WITH ATC INSTRUCTIONS, IE, ALT AND HDG UNTIL PROB DIAGNOSED AND SOLVED, APPROX 40 SECONDS. PULLED CIRCUIT BREAKER FOR TRIM. THIS SHOULD BE STRESSED HEAVILY IN INST TRAINING.

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.