Narrative:

We were cleared for a visual approach to runway 10R at columbus from a position on a right downwind leg. As we began the turn to final at approximately 2500' MSL the tower called out possible traffic at 12 O'clock in the turn, which was a light aircraft maneuvering for a visibility approach to runway 05 and apparently not following the tower's instructions. We did not pick up the traffic after the first call and asked tower to keep us advised. After the second advisory, the first officer acquired the traffic and we initiated an immediate left turn to avoid a collision. After avoiding the immediate threat we resumed the approach and landed uneventfully. After parking at the gate I telephoned the tower to relate what had happened and get the tail # of the light aircraft. It was at this time the controller explained how the light aircraft was not where he was supposed to be. As I understood it, he waited an excessive amount of time to contact tower after the handoff from approach. He was then told to proceed southbound (to stay out of our pattern) before turning base for runway 05. Instead he continued inbound to the field. Flew through our flight path, and thus created a near collision.

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Original NASA ASRS Text

Title: CLOSE PROX ACR-MLG GA-SMA IN TRAFFIC AT CMH.

Narrative: WE WERE CLRED FOR A VISUAL APCH TO RWY 10R AT COLUMBUS FROM A POS ON A RIGHT DOWNWIND LEG. AS WE BEGAN THE TURN TO FINAL AT APPROX 2500' MSL THE TWR CALLED OUT POSSIBLE TFC AT 12 O'CLOCK IN THE TURN, WHICH WAS A LIGHT ACFT MANEUVERING FOR A VIS APCH TO RWY 05 AND APPARENTLY NOT FOLLOWING THE TWR'S INSTRUCTIONS. WE DID NOT PICK UP THE TFC AFTER THE FIRST CALL AND ASKED TWR TO KEEP US ADVISED. AFTER THE SECOND ADVISORY, THE F/O ACQUIRED THE TFC AND WE INITIATED AN IMMEDIATE LEFT TURN TO AVOID A COLLISION. AFTER AVOIDING THE IMMEDIATE THREAT WE RESUMED THE APCH AND LANDED UNEVENTFULLY. AFTER PARKING AT THE GATE I TELEPHONED THE TWR TO RELATE WHAT HAD HAPPENED AND GET THE TAIL # OF THE LIGHT ACFT. IT WAS AT THIS TIME THE CTLR EXPLAINED HOW THE LIGHT ACFT WAS NOT WHERE HE WAS SUPPOSED TO BE. AS I UNDERSTOOD IT, HE WAITED AN EXCESSIVE AMOUNT OF TIME TO CONTACT TWR AFTER THE HDOF FROM APCH. HE WAS THEN TOLD TO PROCEED SBND (TO STAY OUT OF OUR PATTERN) BEFORE TURNING BASE FOR RWY 05. INSTEAD HE CONTINUED INBND TO THE FIELD. FLEW THROUGH OUR FLT PATH, AND THUS CREATED A NEAR COLLISION.

Data retrieved from NASA's ASRS site as of August 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.