SMA INSTRUCTED TO GAR; TURN R. SECOND ACFT RESPONDS TO CLRNC. RPTR LATER CALLED AT HOME REF POSSIBLE NMAC.

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OUR RETURN TO THE ARPT WAS FROM THE N. AFTER RECEIVING THE ATIS INFO; WE RPTED TO FALCON FIELD (FFZ) TWR THAT WE WERE 1 MI N OF THE FOUNTAIN; (A CHKPOINT N OF THE ARPT IN THE COMMUNITY OF FOUNTAIN HILLS); INBOUND FOR LNDG WITH ATIS INFO. I DO REMEMBER THE ALTIMETER SETTING WAS 30.27 (IT WAS 30.28 WHEN WE DEPARTED) AND THE WIND WAS 300 SOMETHING AT 6 KTS. ALSO; THE ACTIVE RWYS HAD BEEN CHANGED TO 22L AND 22R. THE TWR ACKNOWLEDGED AND TOLD ME TO RPT THE RIVER. THIS BRINGS YOU IN ON A R BASE FOR 22L AND 22R. WHEN WE REACHED THE RIVER; I CONTACTED FFZ TWR. I HAD HEARD RPTS OF OTHER INBOUND TFC FROM THE N; WHICH WE HADN'T BEEN ABLE TO SIGHT; AND TOLD THE TWR THAT THE OTHER TFC WAS NOT IN SIGHT. I ALSO CONFIRMED WITH THE TWR THAT I WAS LNDG ON 22L. THE TWR AFFIRMED. I STARTED SETTING UP FOR LNDG ON 22L WHEN THE TWR INSTRUCTED ME TO CHANGE TO 22R. I ACKNOWLEDGED THE CHANGE TO 22R. THE TWR THEN ASKED IF I HAD THE TFC ON FINAL FOR 22R. I TOLD THE TWR THE TFC WAS NOT IN SIGHT; BUT MY SON IMMEDIATELY POINTED OUT THE TFC BELOW AND TO OUR R. I TOLD THE TWR I HAD THE TFC. MY TURN TO FINAL WAS WIDE DUE TO THE LATE CHANGE IN RWYS; IT WOULD HAVE REQUIRED MORE THAN 30 DEGS OF BANK; AND HIGH DUE TO THE DIFFERENCE IN PATTERN ALTS FOR THE 2 RWYS. PATTERN ALT FOR 22L IS 2700 FT AND FOR 22R IT IS 2200 FT. I COULD SEE THE TFC ON SHORT FINAL AHEAD FOR 22R AND ANTICIPATED A GAR INSTRUCTION; WHICH I DID RECEIVE AND IMMEDIATELY COMPLIED WITH. I WAS INSTRUCTED BY THE TWR TO OFFSET TO THE L FOR MY GAR; SO I STARTED MOVING L. I THEN WAS INSTRUCTED TO TURN R XWIND WHEN ABLE. BEFORE I COULD ACKNOWLEDGE; SOMEONE ELSE RESPONDED TO THE CALL. (A PLANE AHEAD ON 22R WHICH HAD JUST TAKEN OFF TURNED R XWIND WHEN THE TWR INSTRUCTED ME TO. THIS COULD HAVE BEEN THE PLT THAT RESPONDED TO THE CALL.) THE TWR CAME RIGHT BACK TO ME AND INSTRUCTED ME TO TURN L XWIND. I ACKNOWLEDGED AND THEN WAS INSTRUCTED TO ENTER A L DOWNWIND FOR 22L. THE LNDG ON 22L WAS UNEVENTFUL. THE REASON I AM FILING THIS RPT IS BECAUSE ONCE I RETURNED HOME AFTER THIS FLT; I RECEIVED A TELEPHONE CALL FROM THE TWR MGR OF FALCON FIELD. HE TOLD ME THAT ANOTHER PLANE; AN SMT ON FINAL FOR 22L HAD FILED A NEAR MISS RPT AND THAT HE WAS FOLLOWING UP ON IT AND NEEDED SOME INFO FROM ME. I GAVE HIM THE SAME INFO THAT I HAVE STATED HERE. IF THERE WAS A NEAR MISS; I WAS UNAWARE OF IT. AT NO TIME DID I SEE ANY CONFLICTING TFC IN MY APCH TO THE ARPT OTHER THAN THE ACFT ON FINAL FOR 22R AHEAD OF ME. I DID NOT SEE THE SMT WHICH WAS TO HAVE BEEN ON FINAL FOR 22L. I FEEL THIS INCIDENT COULD HAVE BEEN PREVENTED IF I HAD BEEN INFORMED IN A TIMELY MANNER OF WHAT I WAS EXPECTED TO DO. ALL INSTRUCTIONS RECEIVED BY ME FROM THE TWR WERE COMPLIED WITH TO THE BEST OF MY ABILITIES.