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Oshkosh, WI
THE PILOT ENTERED TRAFFIC PATTERN DOWNWIND AS NUMBER 3 FOR LANDING. TRAFFIC PATTERN SPACING REQUIRED A THREE MILE FINAL APPROACH OVER LAKE WINNEBAGO. THE PILOT STATED THAT THERE WERE TWO SLOWER AIRCRAFT PRECEEDING HIM AND THAT SPACING BETWEEN AIRCRAFT WAS DIFFICULT TO MAINTAIN. FULL FLAPS AND CARBURETOR HEAT WAS APPLIED AND SHORTLY THEREAFTER THE ENGINE "STARTED RUNNING ROUGH". FULL THROTTLE WAS APPLIED BUT THE ENGINE DID NOT RESPOND. THE PILOT ATTEMPTED TO TURN OUT OF THE PATTERN AND "THE AIRSPEED AND ALTITUDE DECREASED QUICKLY". THE PILOT THEN STALLED THE AIRCRAFT INTO THE LAKE. EXAMINATION OF THE AIRCRAFT ENGINE DISCLOSED NO MALFUNCTION TO THE ENGINE OPERATION.
THE PILOT ENTERED TRAFFIC PATTERN DOWNWIND AS NUMBER 3 FOR LANDING. TRAFFIC PATTERN SPACING REQUIRED A THREE MILE FINAL APPROACH OVER LAKE WINNEBAGO. THE PILOT STATED THAT THERE WERE TWO SLOWER AIRCRAFT PRECEEDING HIM AND THAT SPACING BETWEEN AIRCRAFT WAS DIFFICULT TO MAINTAIN. FULL FLAPS AND CARBURETOR HEAT WAS APPLIED AND SHORTLY THEREAFTER THE ENGINE "STARTED RUNNING ROUGH". FULL THROTTLE WAS APPLIED BUT THE ENGINE DID NOT RESPOND. THE PILOT ATTEMPTED TO TURN OUT OF THE PATTERN AND "THE AIRSPEED AND ALTITUDE DECREASED QUICKLY". THE PILOT THEN STALLED THE AIRCRAFT INTO THE LAKE. EXAMINATION OF THE AIRCRAFT ENGINE DISCLOSED NO MALFUNCTION TO THE ENGINE OPERATION.