An small transport has an engine fail in-flight. Pilot diverts to cak, oh.

Attributes
ACN	413537
Time
Date	199809
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cak
State Reference	OH
Altitude	msl bound lower : 9000 msl bound upper : 9000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cak
Operator	common carrier : air taxi
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 135
Flight Phase	cruise other
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 70 flight time total : 3870 flight time type : 500
ASRS Report	413587
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

During cruise on a return trip from mgw to tol, the left engine failed. First indication was a vibration and surging of the RPM. I made attempts to solve the problem by switching full tanks and adjusting mixture. After the engine quit, the propeller was feathered and the engine secured. An emergency was declared and we requested landing at cak. Landing was made without further problems. The engine had been repaired by our own maintenance department prior to the failure and had approximately 100 hours since the repair. The logbooks showed cylinders replaced. The engine was suspect to myself and one other captain after the repair. Some indications were an abnormal starting (the engine would stop during cranking and then rotated normally). Also, intermittent vibration during flight, and difficulty synchronizing engines. Fuel flow, engine oil pressure, oil temperature and cylinder head temperature were all in the normal operating range prior to the failure. The cause of the failure is yet to be determined, but initial indications are a broken cam shaft or crank shaft. The propeller rotates by hand with little resistance, and the valve in the #1 cylinder does not move after the propeller is rotated.

Original NASA ASRS Text

Title: AN SMT HAS AN ENG FAIL INFLT. PLT DIVERTS TO CAK, OH.

Narrative: DURING CRUISE ON A RETURN TRIP FROM MGW TO TOL, THE L ENG FAILED. FIRST INDICATION WAS A VIBRATION AND SURGING OF THE RPM. I MADE ATTEMPTS TO SOLVE THE PROB BY SWITCHING FULL TANKS AND ADJUSTING MIXTURE. AFTER THE ENG QUIT, THE PROP WAS FEATHERED AND THE ENG SECURED. AN EMER WAS DECLARED AND WE REQUESTED LNDG AT CAK. LNDG WAS MADE WITHOUT FURTHER PROBS. THE ENG HAD BEEN REPAIRED BY OUR OWN MAINT DEPT PRIOR TO THE FAILURE AND HAD APPROX 100 HRS SINCE THE REPAIR. THE LOGBOOKS SHOWED CYLINDERS REPLACED. THE ENG WAS SUSPECT TO MYSELF AND ONE OTHER CAPT AFTER THE REPAIR. SOME INDICATIONS WERE AN ABNORMAL STARTING (THE ENG WOULD STOP DURING CRANKING AND THEN ROTATED NORMALLY). ALSO, INTERMITTENT VIBRATION DURING FLT, AND DIFFICULTY SYNCHRONIZING ENGS. FUEL FLOW, ENG OIL PRESSURE, OIL TEMP AND CYLINDER HEAD TEMP WERE ALL IN THE NORMAL OPERATING RANGE PRIOR TO THE FAILURE. THE CAUSE OF THE FAILURE IS YET TO BE DETERMINED, BUT INITIAL INDICATIONS ARE A BROKEN CAM SHAFT OR CRANK SHAFT. THE PROP ROTATES BY HAND WITH LITTLE RESISTANCE, AND THE VALVE IN THE #1 CYLINDER DOES NOT MOVE AFTER THE PROP IS ROTATED.

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.