ACFT DAMAGED ON LNDG PROC ROLLOUT.

Narrative

WHILE ATTEMPTING TO FLY AHEAD OF AN ONCOMING SQUALL LINE OF TSTMS ON APCH TO MY HOME AIRFIELD; I MONITORED THE PBIA ATIS WHICH RPTED WINDS FROM APPROX 270 AT 10 KTS. THE WINDSOCK AT THE FIELD INDICATED SIMILAR WINDS. I SET UP AN APCH TO RWY 33. (4000 FT X 150 SOD). DURING THE RAINY SEASON IN S FLORIDA THE FIRST 1000 FT OF RWY 33 ARE GENERALLY SOGGY SO I AM IN THE HABIT OF LNDG LONG. AS I DSNDED TO WITHIN 100 FT AGL; I EXPERIENCED A STRONG RADICALLY CHANGING WIND RESULTING IN A TAILWIND WHICH I ESTIMATE TO HAVE BEEN 15-20 KTS. THE RESULTING GND SPD ACCELERATED MY LNDG ROLL. I REALIZED THAT I MIGHT NOT HAVE SUFFICIENT STOPPING DISTANCE AHEAD AND BEGAN TO APPLY HARD BRAKING ACTION. THIS RESULTED IN A LOCKUP OF THE WHEELS ON THE WET SOD RWY. I RELEASED THE BRAKES AND BEGAN TO PUMP THEM TO SLOW THE ACFT. IT WAS OBVIOUS AT THIS TIME THAT THERE WAS INSUFFICIENT RWY LEFT FOR A SUCCESSFUL STOP. HOWEVER; THERE WAS A TXWY TO THE R WHICH LED TO A LONG AND SMOOTH OVERRUN AREA WHICH I ANGLED TOWARD. IT APPEARED THAT I HAD SAVED THE LNDG WHEN THE L MAIN TIRE ENCOUNTERED A PATCH OF BARREN DAMP GND CAUSING A SEVERE DECELERATION WHICH WRENCHED THE ACFT INTO A PERPENDICULAR POS WITH RELATION TO THE CTRLINE OF RWY 33 CREATING A GREAT SIDE FORCE AGAINST THE L MAIN GEAR AND COLLAPSING THE GEAR IN AN INBOARD DIRECTION; BREAKING THE GEAR LEG AND CRUSHING THE GEAR DOOR. THE ACFT CAME TO AN ABRUPT STOP ON THE RWY DROPPING THE WINGTIP GENTLY TO THE GND BUT CAUSING NO FURTHER DAMAGE.