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Potential conflict between an air carrier widebody transport and a corp small transport, opposite direction traffic.
| Attributes | |
| ACN | 206641 |
| Time | |
| Date | 199204 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : lax |
| State Reference | CA |
| Altitude | msl bound lower : 15800 msl bound upper : 16500 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | approach : straight in arrival other arrival star : star enroute airway : zla |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 190 flight time total : 5500 flight time type : 1200 |
| ASRS Report | 206641 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 17000 flight time type : 3400 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : far non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 1000 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
Flight descending on profile descent to lax between 34-50 DME. Cleared from FL190 to 1000 ft and to follow the profile descent. We were alerted to traffic at 1 O'clock 15 mi VFR, small transport 15,500 ft. We began to search, however, forward visibility was poor due to sun/sky and haze layer. At 16500 ft, our TCASII gave us a TA as he appeared on the 14 mi and below setting. At 16000 we responded to the RA of climb which is when we saw the aircraft at 12 oþclock just below. The descent was stopped at 15800 and a climb right turn cleared us of the conflict. The problem was created by a VFR aircraft tracking outbound on the profile descent at an altitude utilized during the descent segment. Poor forward visibility a factor. During these conditions, if know traffic is in the area, dscnts should be limited.
Original NASA ASRS Text
Title: POTENTIAL CONFLICT BTWN AN ACR WDB AND A CORP SMT, OPPOSITE DIRECTION TFC.
Narrative: FLT DSNDING ON PROFILE DSCNT TO LAX BTWN 34-50 DME. CLRED FROM FL190 TO 1000 FT AND TO FOLLOW THE PROFILE DSCNT. WE WERE ALERTED TO TFC AT 1 O'CLOCK 15 MI VFR, SMT 15,500 FT. WE BEGAN TO SEARCH, HOWEVER, FORWARD VISIBILITY WAS POOR DUE TO SUN/SKY AND HAZE LAYER. AT 16500 FT, OUR TCASII GAVE US A TA AS HE APPEARED ON THE 14 MI AND BELOW SETTING. AT 16000 WE RESPONDED TO THE RA OF CLB WHICH IS WHEN WE SAW THE ACFT AT 12 OþCLOCK JUST BELOW. THE DSCNT WAS STOPPED AT 15800 AND A CLB R TURN CLRED US OF THE CONFLICT. THE PROBLEM WAS CREATED BY A VFR ACFT TRACKING OUTBOUND ON THE PROFILE DSCNT AT AN ALT UTILIZED DURING THE DSCNT SEGMENT. POOR FORWARD VISIBILITY A FACTOR. DURING THESE CONDITIONS, IF KNOW TFC IS IN THE AREA, DSCNTS SHOULD BE LIMITED.
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.