Narrative:

Air carrier X, a heavy widebody transport, was on approach for runway 13L. Air carrier Y, a heavy widebody transport, was on approach for runway 22L. Although the runways do not intersect, the missed approach for 13L requires an aircraft to fly directly over or within close proximity to the landing threshold for 22L. The air carrier X was unable to complete the approach due to the inability of the preceding arrival to exit the runway (13L). The air carrier X was given missed approach instructions with which he complied and issued the traffic on approach to runway 22L. At this point the air carrier Y, who was within 1/2 mi of T/D, also executed a missed approach. When questioned later, the pilot said he had thought the missed approach instructions were intended for his aircraft. Air carrier X was forced to maneuver sharply to the left, passing only several hundred ft behind air carrier Y, and then turned back to the right to avoid becoming a possible conflict for the succeeding arrival on 22L. Both aircraft later landed west/O incident. The potential for a similar situation shall exist as long as heavy jet aircraft continue to make simultaneous approachs to 13L and 22L.

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Original NASA ASRS Text

Title: ACR Y TOOK GO AROUND CLRNC FOR ACR X, RESULTING IN A NMAC OVER ARPT.

Narrative: ACR X, A HVY WDB, WAS ON APCH FOR RWY 13L. ACR Y, A HVY WDB, WAS ON APCH FOR RWY 22L. ALTHOUGH THE RWYS DO NOT INTERSECT, THE MISSED APCH FOR 13L REQUIRES AN ACFT TO FLY DIRECTLY OVER OR WITHIN CLOSE PROX TO THE LNDG THRESHOLD FOR 22L. THE ACR X WAS UNABLE TO COMPLETE THE APCH DUE TO THE INABILITY OF THE PRECEDING ARR TO EXIT THE RWY (13L). THE ACR X WAS GIVEN MISSED APCH INSTRUCTIONS WITH WHICH HE COMPLIED AND ISSUED THE TFC ON APCH TO RWY 22L. AT THIS POINT THE ACR Y, WHO WAS WITHIN 1/2 MI OF T/D, ALSO EXECUTED A MISSED APCH. WHEN QUESTIONED LATER, THE PLT SAID HE HAD THOUGHT THE MISSED APCH INSTRUCTIONS WERE INTENDED FOR HIS ACFT. ACR X WAS FORCED TO MANEUVER SHARPLY TO THE LEFT, PASSING ONLY SEVERAL HUNDRED FT BEHIND ACR Y, AND THEN TURNED BACK TO THE RIGHT TO AVOID BECOMING A POSSIBLE CONFLICT FOR THE SUCCEEDING ARR ON 22L. BOTH ACFT LATER LANDED W/O INCIDENT. THE POTENTIAL FOR A SIMILAR SITUATION SHALL EXIST AS LONG AS HVY JET ACFT CONTINUE TO MAKE SIMULTANEOUS APCHS TO 13L AND 22L.

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.