Narrative:

While en route from leesburg regional (lee) to melbourne international (mlb) at 5500 ft I was receiving VFR TA's from orlando approach on 119.4. I was told to fly a course of 160 degrees and had been doing so for several mins. Out of the corner of my eye I caught a bright light and strobes of another aircraft, I suspect that he may have been either climbing or descending as that would explain why I didn't see him until the last moment. As soon as I spotted the aircraft he flew directly over the top of my aircraft at no more than 50 ft. The event happened so fast that I had no time to react. I called approach immediately after to report a plane that passed within 50-100 ft. The controller replied that the traffic had 'just popped up, but was reporting no altitude.' I replied that the aircraft was definitely at my altitude, 5500 ft. Unfortunately, I believe that I did everything I could to avoid the situation, receiving TA's and scanning for traffic. However, it is important to know that even in a radar environment traffic can still go undetected, especially when scanning for traffic visually against a brightly light background.

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Original NASA ASRS Text

Title: VFR PA28 PLT WITH MCO APCH RECEIVING TA'S EXPERIENCED NMAC WITH UNRPTED TFC AT 5500 FT.

Narrative: WHILE ENRTE FROM LEESBURG REGIONAL (LEE) TO MELBOURNE INTL (MLB) AT 5500 FT I WAS RECEIVING VFR TA'S FROM ORLANDO APCH ON 119.4. I WAS TOLD TO FLY A COURSE OF 160 DEGS AND HAD BEEN DOING SO FOR SEVERAL MINS. OUT OF THE CORNER OF MY EYE I CAUGHT A BRIGHT LIGHT AND STROBES OF ANOTHER ACFT, I SUSPECT THAT HE MAY HAVE BEEN EITHER CLBING OR DSNDING AS THAT WOULD EXPLAIN WHY I DIDN'T SEE HIM UNTIL THE LAST MOMENT. AS SOON AS I SPOTTED THE ACFT HE FLEW DIRECTLY OVER THE TOP OF MY ACFT AT NO MORE THAN 50 FT. THE EVENT HAPPENED SO FAST THAT I HAD NO TIME TO REACT. I CALLED APCH IMMEDIATELY AFTER TO RPT A PLANE THAT PASSED WITHIN 50-100 FT. THE CTLR REPLIED THAT THE TFC HAD 'JUST POPPED UP, BUT WAS RPTING NO ALT.' I REPLIED THAT THE ACFT WAS DEFINITELY AT MY ALT, 5500 FT. UNFORTUNATELY, I BELIEVE THAT I DID EVERYTHING I COULD TO AVOID THE SIT, RECEIVING TA'S AND SCANNING FOR TFC. HOWEVER, IT IS IMPORTANT TO KNOW THAT EVEN IN A RADAR ENVIRONMENT TFC CAN STILL GO UNDETECTED, ESPECIALLY WHEN SCANNING FOR TFC VISUALLY AGAINST A BRIGHTLY LIGHT BACKGROUND.

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.