Narrative:

Air carrier X was established via radar vectors on right downwind for runway 1R at 3000 ft. All other aircraft were assigned a speed except us. At approximately 3 mi from field, we were assigned 2000 ft. At 6-7 mi, we were assigned a right turn to heading 300 degrees. We were not offered an explanation (i.e., vectors base leg, etc), and it was clear that this heading and altitude would conflict with a heavy air carrier Y preceding us. I had no idea as to the intent of the controller at this point. As it became more evident that our heading altitude would conflict with air carrier Y, we were instructed to accelerate, and Y was slowed to 150 KTS and given 'south-turns.' still not knowing ATC's intentions, we remained on our last assigned heading of 300 degrees. Next transmission from ATC informed us that we had been cleared for a visual approach to runway 1L, and to proceed to runway 1L and contact tower. After checking in with tower we discovered that we were directly below a business jet Z (citation?) who was not visible to us in our turn, and had also been cleared on a visual approach to runway 1L. (On initial contact with tower, they were obviously shocked that we were lined up for the left runway.) as we were at a lower altitude, we were cleared to land, and the Z jet was sent around. We completed our visual approach to runway 1L, and landed without further incident. I would estimate that our lateral separation Y was less than 2 SM, and that our vertical separation with the Z was approximately 500 ft. A subsequent phone conversation between the captain and ATC revealed that controller training was in progress.

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Original NASA ASRS Text

Title: CTLR TRAINING IN PROGRESS ACR X HAD LTSS WITH ACR Y AND NMAC WITH CPR Z. SYS ERROR.

Narrative: ACR X WAS ESTABLISHED VIA RADAR VECTORS ON R DOWNWIND FOR RWY 1R AT 3000 FT. ALL OTHER ACFT WERE ASSIGNED A SPD EXCEPT US. AT APPROX 3 MI FROM FIELD, WE WERE ASSIGNED 2000 FT. AT 6-7 MI, WE WERE ASSIGNED A R TURN TO HDG 300 DEGS. WE WERE NOT OFFERED AN EXPLANATION (I.E., VECTORS BASE LEG, ETC), AND IT WAS CLR THAT THIS HDG AND ALT WOULD CONFLICT WITH A HVY ACR Y PRECEDING US. I HAD NO IDEA AS TO THE INTENT OF THE CTLR AT THIS POINT. AS IT BECAME MORE EVIDENT THAT OUR HDG ALT WOULD CONFLICT WITH ACR Y, WE WERE INSTRUCTED TO ACCELERATE, AND Y WAS SLOWED TO 150 KTS AND GIVEN 'S-TURNS.' STILL NOT KNOWING ATC'S INTENTIONS, WE REMAINED ON OUR LAST ASSIGNED HDG OF 300 DEGS. NEXT XMISSION FROM ATC INFORMED US THAT WE HAD BEEN CLRED FOR A VISUAL APCH TO RWY 1L, AND TO PROCEED TO RWY 1L AND CONTACT TWR. AFTER CHKING IN WITH TWR WE DISCOVERED THAT WE WERE DIRECTLY BELOW A BUSINESS JET Z (CITATION?) WHO WAS NOT VISIBLE TO US IN OUR TURN, AND HAD ALSO BEEN CLRED ON A VISUAL APCH TO RWY 1L. (ON INITIAL CONTACT WITH TWR, THEY WERE OBVIOUSLY SHOCKED THAT WE WERE LINED UP FOR THE L RWY.) AS WE WERE AT A LOWER ALT, WE WERE CLRED TO LAND, AND THE Z JET WAS SENT AROUND. WE COMPLETED OUR VISUAL APCH TO RWY 1L, AND LANDED WITHOUT FURTHER INCIDENT. I WOULD ESTIMATE THAT OUR LATERAL SEPARATION Y WAS LESS THAN 2 SM, AND THAT OUR VERT SEPARATION WITH THE Z WAS APPROX 500 FT. A SUBSEQUENT PHONE CONVERSATION BTWN THE CAPT AND ATC REVEALED THAT CTLR TRAINING WAS IN PROGRESS.

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.