CONNELLSVILLE, PA, USA
N62RB
THORP T-18
WHILE THE STUDENT WAS TAKING OFF, THE ENGINE BEGAN TO VIBRATE VIOLENTLY AT AN ALTITUDE OF ABOUT 300 TO 400 FT AGL. THE FLIGHT INSTRUCTOR (CFI) TOOK CONTROL AND INITIATED A TURN BACK TO THE AIRPORT. HE STATED THAT DUE TO THE VIBRATION, HE HAD TO REDUCE THE POWER, AND WITH THE POWER REDUCTION, IT WAS IMPOSSIBLE TO MAINTAIN SUFFICIENT ALTITUDE TO REACH THE AIRPORT. WHILE MAKING A FORCED LANDING, DOWNHILL ON SOFT TERRAIN, THE AIRCRAFT WAS DESTROYED. AN INVESTIGATION REVEALED THAT THE METAL LEADING EDGE PORTION OF THE PROPELLER TIP HAD SEPARATED. THE AIRCRAFT WAS EQUIPPED WITH A WOODEN SENSENICH 66LN74 PROPELLER.
Source: NTSB Aviation Accident Database
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