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Near midair collision near civet intersection on arrival to lax, ca, resolved by TCASII RA. ARTCC admitted advisory of VFR aircraft was late.
| Attributes | |
| ACN | 479823 |
| Time | |
| Date | 200007 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| State Reference | CA |
| Altitude | msl bound lower : 17500 msl bound upper : 18000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | descent : vacating altitude |
| Route In Use | arrival star : civet |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | King Air 100 A/B |
| 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 |
| Experience | flight time last 90 days : 150 flight time total : 12000 flight time type : 2000 |
| ASRS Report | 479823 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met conflict : nmac non adherence : published procedure |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | controller : issued alert flight crew : took evasive action other |
| Miss Distance | horizontal : 300 vertical : 100 |
| Supplementary | |
| Problem Areas | Airspace Structure ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
Civet arrival to lax, level at FL180, 5 mi east of civet, we were cleared to descend via the civet arrival. We began our descent immediately so as to cross civet below 17000 ft when ATC called our 'VFR traffic 12 O'clock position, 5 mi, eastbound at 17500 ft.' the traffic appeared on TCASII and the TCASII RA commanded a climb of 2000-2500 FPM. We followed the TCASII guidance and passed above and beside the traffic with 100 ft vertical and 300 ft horizontal separation -- close enough to clearly see the king air pilots. ATC apologized for not calling out the VFR traffic any earlier. We resumed our descent and the remainder of the flight was routine.
Original NASA ASRS Text
Title: NMAC NEAR CIVET INTXN ON ARR TO LAX, CA, RESOLVED BY TCASII RA. ARTCC ADMITTED ADVISORY OF VFR ACFT WAS LATE.
Narrative: CIVET ARR TO LAX, LEVEL AT FL180, 5 MI E OF CIVET, WE WERE CLRED TO DSND VIA THE CIVET ARR. WE BEGAN OUR DSCNT IMMEDIATELY SO AS TO CROSS CIVET BELOW 17000 FT WHEN ATC CALLED OUR 'VFR TFC 12 O'CLOCK POS, 5 MI, EBOUND AT 17500 FT.' THE TFC APPEARED ON TCASII AND THE TCASII RA COMMANDED A CLB OF 2000-2500 FPM. WE FOLLOWED THE TCASII GUIDANCE AND PASSED ABOVE AND BESIDE THE TFC WITH 100 FT VERT AND 300 FT HORIZ SEPARATION -- CLOSE ENOUGH TO CLRLY SEE THE KING AIR PLTS. ATC APOLOGIZED FOR NOT CALLING OUT THE VFR TFC ANY EARLIER. WE RESUMED OUR DSCNT AND THE REMAINDER OF THE FLT WAS ROUTINE.
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.