CLOSE PROX COMMUTER-LTT GA-SMA BOTH ON VISUAL APCHS TO PARALLEL RWYS AT FAT.

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ON APCH TO FRESNO; CA; ILS 29R; FRESNO APCH CALLED SMA TFC TO US 12 MI FROM THE ARPT. HE WAS AT 2600 FT AND AT 10 O'CLOCK POS. WE WERE AT 3000 FT. WE TOLD APCH THAT THE TFC WAS NOT IN SIGHT. THE SMA TFC CONFIRMED TO APCH THAT HE HAD US IN SIGHT. WE THEN WERE TRANSFERRED TO FRESNO TWR. FRESNO TWR RECONFIRMED WITH THE SMA THAT HE HAD US IN SIGHT. WE ADVISED TWR THAT WE STILL DID NOT HAVE THE TFC IN SIGHT. WE WERE CLRED TO LAND 29R AND HE WAS CLRED FOR 29L. AT 6 MI AND 1700 FT; WE SAW THE SMA TFC ON A COLLISION COURSE OF ABOUT 1000 FT HORIZLY AND 200 FT VERT SEPARATION (HE WAS ABOVE US). WE MADE IMMEDIATE EVASIVE MANEUVERS (35 DEG R BANK; 10 DEG NOSE DOWN PITCH; OFF LOC). THE SMA TFC APPEARED TO MAKE A 90 DEG TURN TO THE R WITH A HARD L BANK ONCE PASSING THROUGH THE LOC. AFTER WE HAD PASSED HIM AND HE WAS BEHIND US; WE REINTERCEPTED THE LOC AND LANDED WITHOUT INCIDENT. WE BELIEVE THE SMA DID NOT HAVE US OR THE ARPT IN SIGHT. WE BELIEVE THIS WAS A MAJOR FACTOR THAT CONTRIBUTED TO THIS INCIDENT.