Narrative:

During the initial pre-flight planning; I did a standard briefing using duats to sef airport. However; I failed to take into consideration the NOTAM's for the flight. I made our first radio call on 122.7 reporting my 10 mile mark from the airport. At this time I did not see any other aircraft. At five miles south west of the field I reported on 122.7 that I was going to position and enter on a 45 degree left downwind for runway 36 (as posted in the current AFD). I was looking at the runway and noticed that the runway is now runway 1; instead of runway 36 and also began noticing numerous other aircraft in a right downwind for the runway. I turned to look back in front of me and there was an airplane overflying me at about 200 feet over my altitude. Until this point I heard nothing on 122.7 about all of the traffic so I turned back to the southwest thinking I was on the wrong frequency. I checked but the CTAF was 122.7 and then an automatic recording came over the radio saying there was a special procedure in place with a temporary tower. When we heard this; I continued flying away from the airport back to the south west until we were 10 miles away from sef.

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Original NASA ASRS Text

Title: C152 pilot reports attempting to enter the pattern at SEF during a special event; without being aware of the event and the special procedures in place. A NMAC occurs and eventually a broadcast is heard on the CTAF reporting a temporary Tower in use and the reporter departs the area.

Narrative: During the initial pre-flight planning; I did a standard briefing using DUATS to SEF airport. However; I failed to take into consideration the NOTAM's for the flight. I made our first radio call on 122.7 reporting my 10 mile mark from the airport. At this time I did not see any other aircraft. At five miles south west of the field I reported on 122.7 that I was going to position and enter on a 45 degree left downwind for Runway 36 (As posted in the current AFD). I was looking at the runway and noticed that the runway is now Runway 1; instead of Runway 36 and also began noticing numerous other aircraft in a right downwind for the runway. I turned to look back in front of me and there was an airplane overflying me at about 200 feet over my altitude. Until this point I heard nothing on 122.7 about all of the traffic so I turned back to the southwest thinking I was on the wrong frequency. I checked but the CTAF was 122.7 and then an automatic recording came over the radio saying there was a special procedure in place with a temporary tower. When we heard this; I continued flying away from the airport back to the south west until we were 10 miles away from SEF.

Data retrieved from NASA's ASRS site as of July 2013 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.