Beech 95 left engine began to run rough. Engine was shut down and emergency landing was conducted.

Attributes
ACN	766704
Time
Date	200712
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : zzz.tower
Operator	general aviation : personal
Make Model Name	Travelair 95
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : multi engine pilot : instrument pilot : cfi
Experience	flight time last 90 days : 10 flight time total : 1700 flight time type : 160
ASRS Report	766704
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : landed in emergency condition
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Tanks were topped off prior to departure. Almost 3 hours were burned from the auxiliary tanks. I switched to main tanks approximately 30 mins prior to arrival. At that time; the left main showed full and right main just above 3/4. For the next 30 mins; the left main continued to show full. Approximately 2 mi out; the left engine ran erratic. I shut down the engine; feathered propeller; and emergency landed downwind without incident. There was 1.2 hours of fuel remaining after fueling; all on the right. The left vents were all found to be obstructed. A fuel leak was found in left tanks.

Original NASA ASRS Text

Title: BEECH 95 LEFT ENG BEGAN TO RUN ROUGH. ENG WAS SHUT DOWN AND EMER LNDG WAS CONDUCTED.

Narrative: TANKS WERE TOPPED OFF PRIOR TO DEP. ALMOST 3 HRS WERE BURNED FROM THE AUX TANKS. I SWITCHED TO MAIN TANKS APPROX 30 MINS PRIOR TO ARR. AT THAT TIME; THE L MAIN SHOWED FULL AND R MAIN JUST ABOVE 3/4. FOR THE NEXT 30 MINS; THE L MAIN CONTINUED TO SHOW FULL. APPROX 2 MI OUT; THE L ENG RAN ERRATIC. I SHUT DOWN THE ENG; FEATHERED PROP; AND EMER LANDED DOWNWIND WITHOUT INCIDENT. THERE WAS 1.2 HRS OF FUEL REMAINING AFTER FUELING; ALL ON THE R. THE L VENTS WERE ALL FOUND TO BE OBSTRUCTED. A FUEL LEAK WAS FOUND IN L TANKS.

Data retrieved from NASA's ASRS site as of January 2009 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.