A C206 PLT WAS MET BY AUS POLICE AFTER LNDG; DUE TO AUS TRACON'S ACCUSATION THAT HE VIOLATED P-49.

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I WAS FLYING 3 PAX ON BUSINESS FROM FTW TO AUS. BEFORE DEP I CHKED WITH FWA FSS FOR STATUS OF P-49 AND WAS TOLD IT WAS 'SMALL' TODAY. ENRTE AT 4500 FT MSL; I REFED THE WACO 240 AT 15 MI FOR LOCATION OF P-49 AND BELIEVED I WAS WELL E OF THE AIRSPACE. ON ARR AT AUS; I WAS INSTRUCTED TO TAXI TO FBO RAMP AND WOULD BE MET ON A 'POSSIBLE TFR VIOLATION.' WE WERE MET BY ARPT POLICE AND I WAS TOLD I HAD PENETRATED P-49. AFTER AN INTERVIEW WITH A SECRET SVC AGENT I WAS ASKED TO CALL WACO APCH. I DID SO AND WAS TOLD THAT THE COORDINATES FOR P-49 HAD CHANGED FROM WACO 240 DEGS AT 15 TO THE 241 AT 14.4. THEY SAID THIS RESULTED IN A PENETRATION BY 1/2 MI. IF I DID PENETRATE; IT WAS STRICTLY AN ERROR IN NAV ON MY PART; COMPOUNDED BY NOT HAVING CURRENT AND ACCURATE LOCATION INFO ON THE AIRSPACE. I HAVE FLOWN THIS RTE NUMEROUS TIMES AND HONESTLY THOUGHT I WOULD BE CLR OF P-49. MY GPS DOES NOT DEPICT P-49 AND I WAS USING BOTH THE VOR AND DISTANCE AS WELL AS VISUAL NAV FOR CLRNC. IN THE FUTURE I WILL NOT ONLY BE TALKING TO WACO APCH; BUT WILL ALSO CHK EACH TIME TO BE SURE THE COORDINATES FOR P-49 HAVE NOT CHANGED; REGARDLESS OF THE STATUS OF THE AREA.