Narrative:

Cpr X on visual approach approximately 1.5 mi from runway 36L straight in. Aircraft Y was on right base landing runway 36R. Traffic was pointed out to each aircraft. Cpr X then started a climbing left turn and stated he was going around. I asked the pilot if he wanted resequencing with msy approach or to make left traffic for runway 36L with new ATCT. He chose left traffic, then advised me he had received a TA. The RA advised turn left, and climb at 1900 FPM. Had he done this he would've or could've come very close to inbound traffic to msy crossing new airport at 3000 ft MSL. All coordination was completed with msy approach and no airspace violation occurred nor was separation between aircraft lost at any time. TCASII use in the air traffic area where simultaneous same direction operations are authorized may cause many more instances such as this, which could've ended a whole lot worse. In less than a min, cpr X in responding to the TA (TCASII) would've busted separation with an airliner on approach to new orleans international airport. Numerous aircraft inbound and outbound to msy cross over lakefront airport daily at 3000 ft and with the increased use of TCASII this could easily happen again.

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Original NASA ASRS Text

Title: MULTIPLE RWY OP PARALLEL RWYS CPR X TCASII RA FROM ACFT Y LNDG ON PARALLEL RWY EXECUTED GAR.

Narrative: CPR X ON VISUAL APCH APPROX 1.5 MI FROM RWY 36L STRAIGHT IN. ACFT Y WAS ON R BASE LNDG RWY 36R. TFC WAS POINTED OUT TO EACH ACFT. CPR X THEN STARTED A CLBING L TURN AND STATED HE WAS GOING AROUND. I ASKED THE PLT IF HE WANTED RESEQUENCING WITH MSY APCH OR TO MAKE L TFC FOR RWY 36L WITH NEW ATCT. HE CHOSE L TFC, THEN ADVISED ME HE HAD RECEIVED A TA. THE RA ADVISED TURN L, AND CLB AT 1900 FPM. HAD HE DONE THIS HE WOULD'VE OR COULD'VE COME VERY CLOSE TO INBOUND TFC TO MSY XING NEW ARPT AT 3000 FT MSL. ALL COORD WAS COMPLETED WITH MSY APCH AND NO AIRSPACE VIOLATION OCCURRED NOR WAS SEPARATION BTWN ACFT LOST AT ANY TIME. TCASII USE IN THE ATA WHERE SIMULTANEOUS SAME DIRECTION OPS ARE AUTHORIZED MAY CAUSE MANY MORE INSTANCES SUCH AS THIS, WHICH COULD'VE ENDED A WHOLE LOT WORSE. IN LESS THAN A MIN, CPR X IN RESPONDING TO THE TA (TCASII) WOULD'VE BUSTED SEPARATION WITH AN AIRLINER ON APCH TO NEW ORLEANS INTL ARPT. NUMEROUS ACFT INBOUND AND OUTBOUND TO MSY CROSS OVER LAKEFRONT ARPT DAILY AT 3000 FT AND WITH THE INCREASED USE OF TCASII THIS COULD EASILY HAPPEN AGAIN.

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.