HARD LNDG ON A PVT ARPT. ACFT DAMAGED.

Narrative

ON RETURNING FROM JEFFERSON COUNTY ARPT (0S9) TO MY AIRSTRIP; THE ENG BEGAN RUNNING ROUGH. I SET-UP FOR A LONG STRAIGHT-IN FINAL. UPON REACHING SHORT FINAL; I WAS HIGH AND FAST. I INITIATED A GAR AND THE ENG INITIALLY BEGAN RUNNING AND PULLING. HOWEVER; IT THEN LOST PWR AND RAN ROUGH. I VERIFIED MIXTURE RICH; MAGNETOS ON BOTH; THROTTLE FULL FORWARD AND SWITCHED TANKS. I CONTINUED ON A 360 DEG TURN AND SET THE PLANE DOWN IN THE MIDDLE OF THE AIRSTRIP AT THE S END HEADED N. THE PLANE CAME DOWN HARD; THE L GEAR FAILED AND THE PLANE SKIDDED TO A STOP. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR'S ACFT WAS A 1947 STINSON 108-1. HE HAD BOUGHT THIS ACFT 1 MONTH PRIOR TO THE INCIDENT. IT HAD JUST GONE THROUGH AN ANNUAL INSPECTION. THE STRIP IN QUESTION WAS A PVT ARPT WITH A 1600 FT RWY. THE RPTR STATED THAT HE WAS TOO HIGH TO SLIP THE ACFT ON THE 1ST APCH AND THEN MADE A L TURN DURING HIS GAR; LOSING ALT AS HE PROGRESSED. HE HAD GONE THROUGH HIS EMER CHKLIST EVEN THOUGH HE KNEW THAT HE HAD ALMOST FULL FUEL TANKS; HAVING FLOWN BUT 1 HR AFTER FILLING UP. THE ACFT PARTIALLY RESPONDED TO HIS INPUTS OF PUMPING THE THROTTLE. (THAT ACTION WAS ACTUALLY USING THE ACCELERATOR PUMP FOR PUTTING FUEL INTO THE CARB. LATER; THE RPTR FOUND OUT THAT HE COULD HAVE USED HIS PRIMER FOR THE SAME PURPOSE.) THE ENG WAS STILL NOT PUTTING OUT ENOUGH PWR TO GET HIM AROUND TO THE RWY AGAIN FOR A 'NORMAL' PATTERN SO HE HAD TO CUT IT SHORT. IN DOING SO; HE CAME IN PROX OF TREES THAT ARE SW OF THE APCH END OF THE RWY AND HAD TO 'HAUL' THE ACFT OVER THEM. IN DOING SO HE LOST SPD AND CTL; THUS THE HARD LNDG. HE HAD A HIGHER TIME PLT ON BOARD WITH HIM AS A PAX. THE MECH WAS AN EYEWITNESS ON THE GND. POST FLT INSPECTION REVEALED THAT A RETAINING NUT ON THE FUEL STRAINER HAD RESIDUE FROM A 'LIQUID GASKET' THAT HAD BEEN PLACED AROUND THE WASHER. THIS RESIDUE WAS ALSO FOUND WITHIN THE CARB; ENOUGH TO PARTIALLY PLUG THE 1/32 INCH HOLE IN THE CARB BASE. FUEL FLOW WAS NORMAL OUTSIDE OF THIS AREA. THE INSURANCE COMPANY 'BOUGHT' THE ACFT BACK FROM THE RPTR AND IS UNDERTAKING AN INVESTIGATION OF THE MATTER. THE RPTR HAD NOT NOTIFIED THE FSDO OR THE NTSB UPON ADVICE FROM LEGAL PLT GROUP. THEY SAID THAT THE INCIDENT DID NOT MEET THE CRITERION FOR NTSB OR FAA INVOLVEMENT.