MAY, TX, USA
N9912W
PIPER PA-28-140
THE PLT STATED THE ENG RPM DROPPED TO 1500 DURING LEVEL CRUISE FLT AT 4200 FT MSL. HE COULD NOT REGAIN PWR. HE DIVERTED THE FLT AND ATTEMPTED TO REACH THE BROWNWOOD, TX, ARPT BUT DID NOT HAVE SUFFICIENT ALT. A FORCED LANDING WAS MADE IN A RUGGED, HEAVILY WOODED AREA. A SUBSEQUENT ENG EXAMINATION REVEALED THAT THE #3 EXHAUST VALVE STEM HAD SEPARATED. THE EXHAUST VALVE HEAD HEAVILY DAMAGED THE PISTON AND CYLINDER HEAD. REASON FOR THE VALVE STEM SEPARATION IS UNDETERMINED.
Source: NTSB Aviation Accident Database
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