Pilot of a beech A36 lost power at 1000 ft cruise off shore causing him to request assistance for vectors from approach control to the nearest airport.

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Attributes
ACN	472478
Time
Date	200005
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pbi.airport
State Reference	FL
Altitude	msl single value : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pbi.tracon
Operator	general aviation : personal
Make Model Name	Bonanza 36
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 45 flight time total : 4430 flight time type : 500
ASRS Report	472478
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : engine power out put other flight crewa
Resolutory Action	controller : provided flight assist flight crew : diverted to another airport
Consequence	faa : investigated other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

I was flying my A36 bonanza on a mid-day solo return flight of approximately 40 NM distance from lantana (lna) fl, to home field, 64X near stuart (a 40 NM distance). I had been with flight following from pbi approach control when the engine lost partial power and ran rough. I was just north of the jupiter inlet at 1000 ft over the shoreline when this happened, and notified pbi approach control of my problem. I asked for a vector to north county airport, F45, (which the controller promptly provided). Not knowing specifically what the engine problem was and being barely able to climb at 200 FPM on full power, I declared an emergency to pbi approach. I landed without difficulty at F45. Inspection on the ground indicated that the #5 cylinder head had separated just above the barrel. The cylinder is being replaced along with the associated exhaust manifold, which also cracked. Cylinder pressures taken only 10 hours before and oil change on april with routing oil analysis and oil filter inspection gave no indication of any engine problems.

Original NASA ASRS Text

Title: PLT OF A BEECH A36 LOST PWR AT 1000 FT CRUISE OFF SHORE CAUSING HIM TO REQUEST ASSISTANCE FOR VECTORS FROM APCH CTL TO THE NEAREST ARPT.

Narrative: I WAS FLYING MY A36 BONANZA ON A MID-DAY SOLO RETURN FLT OF APPROX 40 NM DISTANCE FROM LANTANA (LNA) FL, TO HOME FIELD, 64X NEAR STUART (A 40 NM DISTANCE). I HAD BEEN WITH FLT FOLLOWING FROM PBI APCH CTL WHEN THE ENG LOST PARTIAL PWR AND RAN ROUGH. I WAS JUST N OF THE JUPITER INLET AT 1000 FT OVER THE SHORELINE WHEN THIS HAPPENED, AND NOTIFIED PBI APCH CTL OF MY PROB. I ASKED FOR A VECTOR TO N COUNTY ARPT, F45, (WHICH THE CTLR PROMPTLY PROVIDED). NOT KNOWING SPECIFICALLY WHAT THE ENG PROB WAS AND BEING BARELY ABLE TO CLB AT 200 FPM ON FULL PWR, I DECLARED AN EMER TO PBI APCH. I LANDED WITHOUT DIFFICULTY AT F45. INSPECTION ON THE GND INDICATED THAT THE #5 CYLINDER HEAD HAD SEPARATED JUST ABOVE THE BARREL. THE CYLINDER IS BEING REPLACED ALONG WITH THE ASSOCIATED EXHAUST MANIFOLD, WHICH ALSO CRACKED. CYLINDER PRESSURES TAKEN ONLY 10 HRS BEFORE AND OIL CHANGE ON APRIL WITH ROUTING OIL ANALYSIS AND OIL FILTER INSPECTION GAVE NO INDICATION OF ANY ENG PROBS.

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.