BAY ST. LOUIS, MS, USA
N9731N
HICKHAM TWINSTAR
SHORTLY AFTER TAKEOFF ON THE INITIAL TEST FLT, SEVERE VIBRATION WAS FELT AND THE PLT ATTEMPTED TO RETURN THE FLOAT EQUIPPED ACFT TO THE WATER FOR A FORCED LDG. DUE TO LOW ALT, THE PLT HAD TO LAND IN TREES. AN EXAM OF ONE OF THE BLADES OF THE 3 BLADED COMPOSITE PROP REVEALED IT HAD SEPARATED CREATING A VIBRATION SO SEVERE THAT IT SHOOK BOTH CARBURETORS FROM THE ENGINE CAUSING THE ENG FAILURE.
Source: NTSB Aviation Accident Database
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