PIPER PA31 PLT STRUCK BOTH PROP BLADES DURING GAR BECAUSE HE HAD FORGOTTEN TO PUT THE LNDG GEAR DOWN. DAMAGE TO BOTH PROP BLADES WERE NOT NOTICED UNTIL POSTFLT INSPECTION.

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DEPARTED WATERTOWN; NY; AT XA50 ENRTE TO PLATTSBURGH; NY; WITH NO PAX. APPROX 25 MI FROM PLB I OBTAINED THE LCL WX ON THE ASOS FREQ. UPON RECEIVING THE LCL WX; I DECIDED RWY 32 WOULD BE THE ACTIVE RWY. THERE WERE NO OTHER PLANES IN THE PATTERN. WINDS AT THAT TIME WERE FROM 270 DEGS AT 18 KTS GUSTING TO 28 KTS. I DECIDED TO SET UP FOR A 4 MI FINAL APCH; IN ORDER TO BE ESTABLISHED ON THE FINAL APCH COURSE. AT THAT POINT; I AGAIN LISTENED TO THE ASOS TO HEAR 270 DEGS AT 19 KTS GUSTING TO 28 KTS. WHEN DOING MY LNDG CHKLIST; UNICOM CALLED TO CONFIRM THE WINDS AT 260 DEGS AT 18 KTS GUSTING TO 27 KTS. I WAS ESTABLISHED ON A 2.5 MI FINAL APCH COURSE AND I WANTED MY AIRSPD TO BE AT 100-115 KTS OVER THE THRESHOLD. AT APPROX 10-15 FT FROM FLARING; I ENCOUNTERED GUSTY CONDITIONS AND LOST 10 KTS OF AIRSPD. AT THIS POINT THE AIRPLANE DID NOT FEEL STABLE; THEN ONE FINAL CHK OF THE LNDG GEAR INDICATOR LIGHTS SHOWED THAT I DID NOT HAVE 3 GREEN LIGHTS. I APPLIED FULL PWR AND WENT AROUND. I STAYED IN THE PATTERN; CAME AROUND AND LANDED SUCCESSFULLY. AFTER TAXIING TO THE FBO AND PARKING; I SHUT DOWN AND SECURED THE AIRPLANE. IT WAS AT THIS TIME I NOTICED THE PROPS HAD BEEN STRUCK. AT NO TIME DID I FEEL OR HEAR ANY PROP STRIKE. I ATTRIBUTE DISTR TO THE GUSTY CONDITIONS AND THE WINDSHEAR. I ALSO BELIEVE THE UNICOM OPERATOR DID NOT HAVE TO ANNOUNCE THE WINDS SINCE THE INFO IS BEING BROADCAST ON THE ASOS FREQ. I BELIEVE A WINDSHEAR DETECTION SVC SHOULD BE INCLUDED ON THE ASOS. DAMAGE WAS LIMITED TO THE PROP TIPS.