Narrative:

I was in the traffic pattern at jac practicing touch-and-goes on runway 18. On my 3RD or 4TH downwind leg I heard an aircraft call unicom for an advisory and receive no answer. I continued to announce my position on the CTAF (as is my habit) on downwind, base, and final. Since the other aircraft had not reported a position or called again, I was watching for him on the taxiway. As I was touching down on the 4TH landing, I saw an aircraft coming toward me and veering off to my right, and climbing very slowly. I cleared the runway normally, and stopped to look back for the other aircraft, as I was concerned that he might have had an accident. As I taxied and parked I saw him park at the other FBO, without any radio announcement. I called from my FBO and asked to speak to the pilot of the other aircraft. I asked him if he had heard my position reports. He said no. I asked him what frequency he had been on. He said 123.0. I told him the published CTAF is 122.8, and that since this is a busy airport, I recommend monitoring the frequency. He claimed that he had the right-of- way and criticized me for not seeing him. I told him I did not expect to see an unannounced aircraft landing with 10-15 KTS of tailwind. He subsequently taxied out and departed without a single radio call. This is the second near miss of this type I know of at this airport in the past 2 months. The other one also involved an aircraft without a radio. A control tower would help reduce these kinds of conflicts by requiring communication. I wish I had seen him sooner, and will be more vigilant for opposing aircraft on final. However, he was black and difficult to distinguish from ground clutter when I did see him. I'm not sure I could have spotted him sooner. He's lucky it was a quiet day. On a busy summer day, he probably would have had several near misses from that one downwind approach.

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Original NASA ASRS Text

Title: PLT OF SMA HAD NMAC WITH ANOTHER SMA COMING AT HER FROM OPPOSITE DIRECTION WHILE JUST TOUCHING DOWN ON LNDG.

Narrative: I WAS IN THE TFC PATTERN AT JAC PRACTICING TOUCH-AND-GOES ON RWY 18. ON MY 3RD OR 4TH DOWNWIND LEG I HEARD AN ACFT CALL UNICOM FOR AN ADVISORY AND RECEIVE NO ANSWER. I CONTINUED TO ANNOUNCE MY POS ON THE CTAF (AS IS MY HABIT) ON DOWNWIND, BASE, AND FINAL. SINCE THE OTHER ACFT HAD NOT RPTED A POS OR CALLED AGAIN, I WAS WATCHING FOR HIM ON THE TXWY. AS I WAS TOUCHING DOWN ON THE 4TH LNDG, I SAW AN ACFT COMING TOWARD ME AND VEERING OFF TO MY R, AND CLBING VERY SLOWLY. I CLRED THE RWY NORMALLY, AND STOPPED TO LOOK BACK FOR THE OTHER ACFT, AS I WAS CONCERNED THAT HE MIGHT HAVE HAD AN ACCIDENT. AS I TAXIED AND PARKED I SAW HIM PARK AT THE OTHER FBO, WITHOUT ANY RADIO ANNOUNCEMENT. I CALLED FROM MY FBO AND ASKED TO SPEAK TO THE PLT OF THE OTHER ACFT. I ASKED HIM IF HE HAD HEARD MY POS RPTS. HE SAID NO. I ASKED HIM WHAT FREQ HE HAD BEEN ON. HE SAID 123.0. I TOLD HIM THE PUBLISHED CTAF IS 122.8, AND THAT SINCE THIS IS A BUSY ARPT, I RECOMMEND MONITORING THE FREQ. HE CLAIMED THAT HE HAD THE RIGHT-OF- WAY AND CRITICIZED ME FOR NOT SEEING HIM. I TOLD HIM I DID NOT EXPECT TO SEE AN UNANNOUNCED ACFT LNDG WITH 10-15 KTS OF TAILWIND. HE SUBSEQUENTLY TAXIED OUT AND DEPARTED WITHOUT A SINGLE RADIO CALL. THIS IS THE SECOND NEAR MISS OF THIS TYPE I KNOW OF AT THIS ARPT IN THE PAST 2 MONTHS. THE OTHER ONE ALSO INVOLVED AN ACFT WITHOUT A RADIO. A CTL TWR WOULD HELP REDUCE THESE KINDS OF CONFLICTS BY REQUIRING COM. I WISH I HAD SEEN HIM SOONER, AND WILL BE MORE VIGILANT FOR OPPOSING ACFT ON FINAL. HOWEVER, HE WAS BLACK AND DIFFICULT TO DISTINGUISH FROM GND CLUTTER WHEN I DID SEE HIM. I'M NOT SURE I COULD HAVE SPOTTED HIM SOONER. HE'S LUCKY IT WAS A QUIET DAY. ON A BUSY SUMMER DAY, HE PROBABLY WOULD HAVE HAD SEVERAL NEAR MISSES FROM THAT ONE DOWNWIND APCH.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.