Narrative:

We had been cleared to 3000' and intercept the localizer to 24L. Because of an earlier restriction we were about 1000' high on intercept. As we intercepted in a left turn we saw an large transport Y in a right turn in front of us coming from our right to left, less than 1/2 mi and 1000' below. Our excess speed closed this gap somewhat. When we asked about it we were told for the first time it was on a visual approach to the parallel runway. We were approximately 5-7 mi out and could only see one set of approach lights (other set notamed out). We were turned over to tower and reconfigured for a high drag descent and continued approach for runway 24L. Between 2-3 mi out we contacted tower and were cleared to land on runway 24L. Between 1 1/2-2 mi at about 900', tower transmitted a garbled command to execute a missed approach. We immediately questioned the call and understood the next call for an small aircraft Z to go around and gave a heading. We were at approximately 500' and 1 mi and were reclred to land. We spotted the small aircraft Z over the approach lights climbing right to left heading south. We passed behind this aircraft at about 200' altitude with less than 500' sep. Normal landing. When asked ground controller said he had been cleared to land, but had really slowed down. In both cases, we had not been advised of the presence of the other aircraft until the incident. Both aircraft were under positive control. Only because we were out of position because of an earlier restriction did a severe incident with the large transport Y not occur. We never saw the small aircraft Z until he started his go around.

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Original NASA ASRS Text

Title: MLG SEES LGT ON VISUAL APCH IN CLOSE PROX THEN LATER HEARS SMA GIVEN GO AROUND AND SEES THAT ACFT IN CLOSE PROX. REPORTER CITES POOR ATC TECHNIQUE.

Narrative: WE HAD BEEN CLRED TO 3000' AND INTERCEPT THE LOC TO 24L. BECAUSE OF AN EARLIER RESTRICTION WE WERE ABOUT 1000' HIGH ON INTERCEPT. AS WE INTERCEPTED IN A LEFT TURN WE SAW AN LGT Y IN A RIGHT TURN IN FRONT OF US COMING FROM OUR RIGHT TO LEFT, LESS THAN 1/2 MI AND 1000' BELOW. OUR EXCESS SPD CLOSED THIS GAP SOMEWHAT. WHEN WE ASKED ABOUT IT WE WERE TOLD FOR THE FIRST TIME IT WAS ON A VISUAL APCH TO THE PARALLEL RWY. WE WERE APPROX 5-7 MI OUT AND COULD ONLY SEE ONE SET OF APCH LIGHTS (OTHER SET NOTAMED OUT). WE WERE TURNED OVER TO TWR AND RECONFIGURED FOR A HIGH DRAG DSCNT AND CONTINUED APCH FOR RWY 24L. BTWN 2-3 MI OUT WE CONTACTED TWR AND WERE CLRED TO LAND ON RWY 24L. BTWN 1 1/2-2 MI AT ABOUT 900', TWR XMITTED A GARBLED COMMAND TO EXECUTE A MISSED APCH. WE IMMEDIATELY QUESTIONED THE CALL AND UNDERSTOOD THE NEXT CALL FOR AN SMA Z TO GO AROUND AND GAVE A HDG. WE WERE AT APPROX 500' AND 1 MI AND WERE RECLRED TO LAND. WE SPOTTED THE SMA Z OVER THE APCH LIGHTS CLBING RIGHT TO LEFT HDG S. WE PASSED BEHIND THIS ACFT AT ABOUT 200' ALT WITH LESS THAN 500' SEP. NORMAL LNDG. WHEN ASKED GND CTLR SAID HE HAD BEEN CLRED TO LAND, BUT HAD REALLY SLOWED DOWN. IN BOTH CASES, WE HAD NOT BEEN ADVISED OF THE PRESENCE OF THE OTHER ACFT UNTIL THE INCIDENT. BOTH ACFT WERE UNDER POSITIVE CTL. ONLY BECAUSE WE WERE OUT OF POS BECAUSE OF AN EARLIER RESTRICTION DID A SEVERE INCIDENT WITH THE LGT Y NOT OCCUR. WE NEVER SAW THE SMA Z UNTIL HE STARTED HIS GO AROUND.

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.