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A B757 captain on the civet 4 STAR into lax experienced an near midair collision with a small aircraft.
| Attributes | |
| ACN | 454446 |
| Time | |
| Date | 199911 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : arnes |
| State Reference | CA |
| Altitude | msl bound lower : 9800 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude descent : vacating altitude |
| Route In Use | arrival star : civet 4 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Fixed Gear |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : multi engine pilot : instrument |
| Experience | flight time last 90 days : 255 flight time total : 11000 flight time type : 7000 |
| ASRS Report | 454446 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | aircraft equipment : tcas other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued alert |
| Miss Distance | horizontal : 0 vertical : 100 |
| Supplementary | |
| Problem Areas | Airspace Structure ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Airspace Structure |
Narrative:
While descending on the civit 4 arrival into lax, we were given a frequency change to socal approach. After checking on, we were given a TA, VFR traffic at our 10 O'clock position less than 3 mi at 10500 ft unverified. We were at 11000 ft descending to cross arnes intersection at 10000 ft. Our TCASII showed the traffic at about the same time as approach had pointed it out to us. Approach told us to stop our descent, which we complied with. Within approximately 5 seconds we received a TA on our TCASII followed very quickly by an RA indicating a descent was required to avoid the traffic. Immediately the autoplt was disconnected, thrust levers retarded and the speed brakes fully extended with a very positive forward pressure placed on the control wheel. When we finally saw the traffic it was passing above the flight deck at a distance of less than 200 ft. It was a single engine low wing aircraft. We advised approach that the traffic passed at a very close proximity to us.
Original NASA ASRS Text
Title: A B757 CAPT ON THE CIVET 4 STAR INTO LAX EXPERIENCED AN NMAC WITH A SMALL ACFT.
Narrative: WHILE DSNDING ON THE CIVIT 4 ARR INTO LAX, WE WERE GIVEN A FREQ CHANGE TO SOCAL APCH. AFTER CHKING ON, WE WERE GIVEN A TA, VFR TFC AT OUR 10 O'CLOCK POS LESS THAN 3 MI AT 10500 FT UNVERIFIED. WE WERE AT 11000 FT DSNDING TO CROSS ARNES INTXN AT 10000 FT. OUR TCASII SHOWED THE TFC AT ABOUT THE SAME TIME AS APCH HAD POINTED IT OUT TO US. APCH TOLD US TO STOP OUR DSCNT, WHICH WE COMPLIED WITH. WITHIN APPROX 5 SECONDS WE RECEIVED A TA ON OUR TCASII FOLLOWED VERY QUICKLY BY AN RA INDICATING A DSCNT WAS REQUIRED TO AVOID THE TFC. IMMEDIATELY THE AUTOPLT WAS DISCONNECTED, THRUST LEVERS RETARDED AND THE SPD BRAKES FULLY EXTENDED WITH A VERY POSITIVE FORWARD PRESSURE PLACED ON THE CTL WHEEL. WHEN WE FINALLY SAW THE TFC IT WAS PASSING ABOVE THE FLT DECK AT A DISTANCE OF LESS THAN 200 FT. IT WAS A SINGLE ENG LOW WING ACFT. WE ADVISED APCH THAT THE TFC PASSED AT A VERY CLOSE PROX TO US.
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.