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Near midair collision between a DC10 descending on arrival through 10500 ft in class B airspace and a large single engine cessna crossing through the DC10's flight path. Approach controller observed a target at 4500 ft and subsequently after passing at 10500 ft. TCASII alerted DC10 crew to cessna's presence.
| Attributes | |
| ACN | 492487 |
| Time | |
| Date | 200009 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lax.airport |
| State Reference | CA |
| Altitude | msl bound lower : 10500 msl bound upper : 10800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 25l |
| Flight Phase | descent : vacating altitude |
| Route In Use | approach : visual arrival star : ns |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Make Model Name | Cessna Single Turboprop Undifferentiated or Other Model |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 2000 |
| ASRS Report | 492487 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | flight crew : took precautionary avoidance action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 50 vertical : 200 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
We were flying the civet arrival to lax runway 25L lax 38I lax DME from lax. Just inside bremr descending at 500-1000 FPM, we received a TA at 11500 ft, followed by an RA 'reduce descent.' I leveled off at 10800 ft. We then received a 'monitor vertical speed' RA. At the same time the other aircraft coming at us from right to left went under the nose showing -200 ft separation. We told lax approach control we had an RA. Their response was they showed the aircraft at 4500 ft, then 10500 ft after we crossed paths. We acquired the other aircraft visually at 1 mi. It appeared to be a large high wing cessna at 10500 ft. If we did not have the TCASII, we would have been close indeed.
Original NASA ASRS Text
Title: NMAC BTWN A DC10 DSNDING ON ARR THROUGH 10500 FT IN CLASS B AIRSPACE AND A LARGE SINGLE ENG CESSNA XING THROUGH THE DC10'S FLT PATH. APCH CTLR OBSERVED A TARGET AT 4500 FT AND SUBSEQUENTLY AFTER PASSING AT 10500 FT. TCASII ALERTED DC10 CREW TO CESSNA'S PRESENCE.
Narrative: WE WERE FLYING THE CIVET ARR TO LAX RWY 25L LAX 38I LAX DME FROM LAX. JUST INSIDE BREMR DSNDING AT 500-1000 FPM, WE RECEIVED A TA AT 11500 FT, FOLLOWED BY AN RA 'REDUCE DSCNT.' I LEVELED OFF AT 10800 FT. WE THEN RECEIVED A 'MONITOR VERT SPD' RA. AT THE SAME TIME THE OTHER ACFT COMING AT US FROM R TO L WENT UNDER THE NOSE SHOWING -200 FT SEPARATION. WE TOLD LAX APCH CTL WE HAD AN RA. THEIR RESPONSE WAS THEY SHOWED THE ACFT AT 4500 FT, THEN 10500 FT AFTER WE CROSSED PATHS. WE ACQUIRED THE OTHER ACFT VISUALLY AT 1 MI. IT APPEARED TO BE A LARGE HIGH WING CESSNA AT 10500 FT. IF WE DID NOT HAVE THE TCASII, WE WOULD HAVE BEEN CLOSE INDEED.
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.