GA small aircraft unable to unfeather engine after it had been shut down on a training flight.

Attributes
ACN	103713
Time
Date	198902
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lvk
State Reference	CA
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lvk
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : cfi
Experience	flight time last 90 days : 180 flight time total : 930 flight time type : 45
ASRS Report	103713
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : anomaly accepted none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

During multi-engine training an intentional feather was performed on the right engine. Unable to get out of feather. Notified lvk tower but declared no emergency and requested no assistance at any time. Landed with left engine operative only. Unfeathering accumulator probable culprit. Exhausted all other methods of engine starting (priming, manual start, etc). Received no priority at any time.

Original NASA ASRS Text

Title: GA SMA UNABLE TO UNFEATHER ENGINE AFTER IT HAD BEEN SHUT DOWN ON A TRAINING FLT.

Narrative: DURING MULTI-ENG TRNING AN INTENTIONAL FEATHER WAS PERFORMED ON THE RIGHT ENG. UNABLE TO GET OUT OF FEATHER. NOTIFIED LVK TWR BUT DECLARED NO EMER AND REQUESTED NO ASSISTANCE AT ANY TIME. LANDED WITH LEFT ENG OPERATIVE ONLY. UNFEATHERING ACCUMULATOR PROBABLE CULPRIT. EXHAUSTED ALL OTHER METHODS OF ENG STARTING (PRIMING, MANUAL START, ETC). RECEIVED NO PRIORITY AT ANY TIME.

Data retrieved from NASA's ASRS site as of August 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.