PIPER PA18 PLT FLEW OVER HER HOUSE BELOW THE MSA AND WAS SUBSEQUENTLY INTERCEPTED BY LAW ENFORCEMENT HELI AND QUESTIONED REGARDING HER LOW FLT.

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AT APPROX XA30 ON APR/XA/02; I WAS FLYING MY PA18/150 SUPER CUB FROM SGJ ARPT (WHERE I AM BASED) TO EVB. ON THE WAY; I FLEW OVER MY HOUSE AND CIRCLED IT ONCE OR TWICE. I KNOW THAT FLT RULES REQUIRE I BE AT 1000 FT AGL OR ABOVE. I FLEW OVER THE HOUSE AT 1000 FT; BUT ADMITTEDLY MAY HAVE DSNDED BELOW THAT ALT DURING A MOMENT OR TWO OF INATTN. AFTER I LEFT MY NEIGHBORHOOD; I FLEW S ALONG THE SHORELINE; JUST OFFSHORE; WHEN I SAW A HELI COMING THE OTHER WAY. I WAS STILL ON UNICOM FREQ FOR ST AUGUSTINE (122.8) WHEN THE HELI CONTACTED AND FOLLOWED ME (HE TURNED INTO ME). HE ASKED ME WHAT I WAS DOING 'FLYING SO LOW' AROUND 11TH STREET. I REPLIED I WAS FLYING AT 1000 FT AGL; BUT MIGHT HAVE GONE BELOW THAT INADVERTENTLY. HE ASKED ME A NUMBER OF OTHER QUESTIONS -- WHERE I WAS BASED; ETC; AND APPARENTLY CALLED THE ST AUGUSTINE ARPT LATER ASKING ABOUT ME. FRANKLY; THE HELI 'ESCORT' WAS RATHER BIZARRE. I WAS TOLD BY THE MGR OF THE FBO THAT THE PLT WAS NOT; AS HE SAID; WITH THE ST JOHN'S COUNTY SHERIFF'S DEPT; BUT INDEED A FISH AND WILDLIFE OFFICER.