Narrative:

Aircraft X was conducting touch-and-go traffic pattern training operations as aircraft Y reported 3 mi east of olv on CTAF. On upwind leg, aircraft X reported location and altitude and asked if aircraft Y had aircraft X in sight. He said yes, he had traffic on the downwind in sight. Aircraft X responded with restatement of position as we turned crosswind for runway 18. Aircraft Y reported making a 360 degree turn to slow down and keep spacing in the pattern. Aircraft X turned on downwind and made appropriate radio call. As aircraft X rolled wings to level, aircraft Y was to our 10-11 O'clock position, same altitude heading directly towards aircraft X. Aircraft X then made a diving right turn to avoid aircraft Y (20 degrees right and 10 degrees nose down). Aircraft Y passed behind aircraft X and then proceeded to fly parallel of aircraft X about 600 ft to the right wingtip in the pattern. Contributing factors: aircraft Y's failure to be properly configured (slowed) prior to entering the pattern. Aircraft Y performed a 360 degree left turn 'inside' the traffic pattern. Aircraft X was high-winged, which limited visibility to the 'inside' of turns. (Olv uses l-hand traffic patterns for runway 18.) there is no tower control at olv, which is the busiest airport in mississippi by number of arrs and departures on a daily basis.

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Original NASA ASRS Text

Title: C152 AND C421 HAD NMAC AT OLV.

Narrative: ACFT X WAS CONDUCTING TOUCH-AND-GO TFC PATTERN TRAINING OPS AS ACFT Y RPTED 3 MI E OF OLV ON CTAF. ON UPWIND LEG, ACFT X RPTED LOCATION AND ALT AND ASKED IF ACFT Y HAD ACFT X IN SIGHT. HE SAID YES, HE HAD TFC ON THE DOWNWIND IN SIGHT. ACFT X RESPONDED WITH RESTATEMENT OF POS AS WE TURNED XWIND FOR RWY 18. ACFT Y RPTED MAKING A 360 DEG TURN TO SLOW DOWN AND KEEP SPACING IN THE PATTERN. ACFT X TURNED ON DOWNWIND AND MADE APPROPRIATE RADIO CALL. AS ACFT X ROLLED WINGS TO LEVEL, ACFT Y WAS TO OUR 10-11 O'CLOCK POS, SAME ALT HDG DIRECTLY TOWARDS ACFT X. ACFT X THEN MADE A DIVING R TURN TO AVOID ACFT Y (20 DEGS R AND 10 DEGS NOSE DOWN). ACFT Y PASSED BEHIND ACFT X AND THEN PROCEEDED TO FLY PARALLEL OF ACFT X ABOUT 600 FT TO THE R WINGTIP IN THE PATTERN. CONTRIBUTING FACTORS: ACFT Y'S FAILURE TO BE PROPERLY CONFIGURED (SLOWED) PRIOR TO ENTERING THE PATTERN. ACFT Y PERFORMED A 360 DEG L TURN 'INSIDE' THE TFC PATTERN. ACFT X WAS HIGH-WINGED, WHICH LIMITED VISIBILITY TO THE 'INSIDE' OF TURNS. (OLV USES L-HAND TFC PATTERNS FOR RWY 18.) THERE IS NO TWR CTL AT OLV, WHICH IS THE BUSIEST ARPT IN MISSISSIPPI BY NUMBER OF ARRS AND DEPS ON A DAILY BASIS.

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.