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Sct exchanges traffic with arriving B767. B767 assumes traffic observed was pertinent traffic. B767 initiates TCASII evasive maneuver for actual traffic descending from above and behind.
| Attributes | |
| ACN | 446260 |
| Time | |
| Date | 199908 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sct.tracon |
| State Reference | CA |
| Altitude | msl bound lower : 1500 msl bound upper : 2000 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 25l |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport |
| Operating Under FAR Part | Part 121 |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 445260 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | conflict : airborne critical non adherence : published procedure other spatial deviation |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | vertical : 400 |
| Supplementary | |
| Problem Areas | Airspace Structure ATC Human Performance Airport Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
We (aircraft X) were on an approach to runway 25L at lax. Approach told us that we had traffic to the parallel runway and that he had us in sight. We thought he meant the north complex and in fact we saw traffic off to our right for runway 24R. As we descended on the localizer/GS through about 2000 ft, we received a TCASII RA to descend at 1500 FPM. At the lowest scale our TCASII showed that we had traffic descending on top of us. At 400 ft or so, I decided to turn left to get out of the way and when I did, the RA ended. We had told the tower that we were going around and asked if we could salvage the approach. They said yes, and I turned back to the runway. It was at that time that we saw air carrier Y turboprop just off our right wing. We had no idea that this aircraft was ever there. We contacted the tower by phone on the ground and they had us call TRACON. The person I told this story to told me that they were in compliance by stating that we had parallel traffic. I told them that had they told us that the traffic was coming up from behind us for runway 25R, we would have known what was going on.
Original NASA ASRS Text
Title: SCT EXCHANGES TFC WITH ARRIVING B767. B767 ASSUMES TFC OBSERVED WAS PERTINENT TFC. B767 INITIATES TCASII EVASIVE MANEUVER FOR ACTUAL TFC DSNDING FROM ABOVE AND BEHIND.
Narrative: WE (ACFT X) WERE ON AN APCH TO RWY 25L AT LAX. APCH TOLD US THAT WE HAD TFC TO THE PARALLEL RWY AND THAT HE HAD US IN SIGHT. WE THOUGHT HE MEANT THE N COMPLEX AND IN FACT WE SAW TFC OFF TO OUR R FOR RWY 24R. AS WE DSNDED ON THE LOC/GS THROUGH ABOUT 2000 FT, WE RECEIVED A TCASII RA TO DSND AT 1500 FPM. AT THE LOWEST SCALE OUR TCASII SHOWED THAT WE HAD TFC DSNDING ON TOP OF US. AT 400 FT OR SO, I DECIDED TO TURN L TO GET OUT OF THE WAY AND WHEN I DID, THE RA ENDED. WE HAD TOLD THE TWR THAT WE WERE GOING AROUND AND ASKED IF WE COULD SALVAGE THE APCH. THEY SAID YES, AND I TURNED BACK TO THE RWY. IT WAS AT THAT TIME THAT WE SAW ACR Y TURBOPROP JUST OFF OUR R WING. WE HAD NO IDEA THAT THIS ACFT WAS EVER THERE. WE CONTACTED THE TWR BY PHONE ON THE GND AND THEY HAD US CALL TRACON. THE PERSON I TOLD THIS STORY TO TOLD ME THAT THEY WERE IN COMPLIANCE BY STATING THAT WE HAD PARALLEL TFC. I TOLD THEM THAT HAD THEY TOLD US THAT THE TFC WAS COMING UP FROM BEHIND US FOR RWY 25R, WE WOULD HAVE KNOWN WHAT WAS GOING ON.
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.