In-flight engine shutdown due to uncontrollable propeller.

Attributes
ACN	285093
Time
Date	199410
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : rdu
State Reference	NC
Altitude	msl bound lower : 12000 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdv
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other other
Route In Use	enroute airway : zdc
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp
Experience	flight time last 90 days : 230 flight time total : 7800 flight time type : 1000
ASRS Report	285093
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

After having the same emergency 1 day prior in same aircraft. I departed orf for rdu. This was its first flight after maintenance replaced the overspd governor. While in cruise flight, right propeller RPM fell well below cruise limits (almost feather position). Immediately sought proper action and retarded power on that engine. Then, with propeller RPM still erratic, followed procedures for engine shutdown and declared an emergency, once again landed uneventfully and notified maintenance of situation.

Original NASA ASRS Text

Title: INFLT ENG SHUTDOWN DUE TO UNCTLABLE PROP.

Narrative: AFTER HAVING THE SAME EMER 1 DAY PRIOR IN SAME ACFT. I DEPARTED ORF FOR RDU. THIS WAS ITS FIRST FLT AFTER MAINT REPLACED THE OVERSPD GOVERNOR. WHILE IN CRUISE FLT, R PROP RPM FELL WELL BELOW CRUISE LIMITS (ALMOST FEATHER POS). IMMEDIATELY SOUGHT PROPER ACTION AND RETARDED PWR ON THAT ENG. THEN, WITH PROP RPM STILL ERRATIC, FOLLOWED PROCS FOR ENG SHUTDOWN AND DECLARED AN EMER, ONCE AGAIN LANDED UNEVENTFULLY AND NOTIFIED MAINT OF SIT.

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.