C340 pilot got a false stall warning.

Attributes
ACN	409806
Time
Date	199807
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : apa
State Reference	CO
Altitude	msl bound lower : 13000 msl bound upper : 13000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : den
Operator	general aviation : personal
Make Model Name	Cessna 340/340A
Operating Under FAR Part	Part 91
Flight Phase	descent other other
Route In Use	arrival other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 30 flight time total : 2500 flight time type : 1000
ASRS Report	409806
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

While on vectored approach to den, descending through 13000 ft in IMC, a loud warning buzzer activated in cockpit. Requested and obtained immediate descent and vector to nearest airport, apa at 8 mi. Excellent coordination from approach and apa control tower. Upon landing and investigation, aircraft stall warning malfunctioned at actuator.

Original NASA ASRS Text

Title: C340 PLT GOT A FALSE STALL WARNING.

Narrative: WHILE ON VECTORED APCH TO DEN, DSNDING THROUGH 13000 FT IN IMC, A LOUD WARNING BUZZER ACTIVATED IN COCKPIT. REQUESTED AND OBTAINED IMMEDIATE DSCNT AND VECTOR TO NEAREST ARPT, APA AT 8 MI. EXCELLENT COORD FROM APCH AND APA CTL TWR. UPON LNDG AND INVESTIGATION, ACFT STALL WARNING MALFUNCTIONED AT ACTUATOR.

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.