OKEECHOBEE, FL, USA
N123EF
GRUMMAN AMERICAN AA-5B
THE PLT REPORTED THAT DURING FLT, THE ENG HAD A PARTIAL LOSS OF POWER. HE ATTEMPTED TO DIVERT TO AN ARPT. HE WAS ABLE TO GET ON FINAL APCH, BUT WHEN HE SAW HE COULD NOT REACH THE RUNWAY, HE TURNED AWAY FROM THE LIGHTS & A BUILDING FOR AN EMERGENCY LANDING. HOWEVER, BEFORE LANDING, THE ACFT COLLIDED WITH POWER LINES, THEN IMPACTED THE GROUND. AN EXAM OF THE ENG REVEALED THAT THE EXHAUST VALVE HEAD OF THE #1 CYLINDER HAD SEPARATED. WITH CONTINUED OPERATION OF THE ENG, DEBRIS ENTERED THE #1 CYLINDER CAUSING FURTHER DAMAGE & LOSS OF POWER. THE SODIUM COOLED EXHAUST VALVE, PN 74541 AH-ED, HAD APRX 300 HRS IN SERVICE.
Source: NTSB Aviation Accident Database
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