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An air carrier flight crew flying a B737-400 at 3000 ft MSL near smo reports a TCASII RA and near midair collision.
| Attributes | |
| ACN | 488123 |
| Time | |
| Date | 200010 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| State Reference | CA |
| Altitude | msl bound lower : 2500 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | Marginal |
| Weather Elements | other |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors arrival star : derbb |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 80 flight time total : 1700 flight time type : 80 |
| ASRS Report | 488123 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 90 flight time total : 15000 flight time type : 600 |
| ASRS Report | 487629 |
| Events | |
| Anomaly | conflict : airborne critical conflict : nmac |
| Independent Detector | aircraft equipment : tcas other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued advisory flight crew : took evasive action |
| Miss Distance | horizontal : 500 vertical : 200 |
| Supplementary | |
| Problem Areas | Airspace Structure Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Ambiguous |
Narrative:
During approach to lax, we were cleared out of 7000 ft to 2500 ft on a 110 degree heading. Approximately 8 DME from smo passing through 3000 ft, we received a TCASII traffic alert at 3 NM off the nose. At 2700 ft, the TCASII switched to an RA and command 'stop rate of descent.' I was the PF so I immediately clicked off the autoplt and autothrottles, advanced the throttles, and pitched the nose up into a climb. As we climbed through 3000 ft, we spotted a low wing light aircraft approximately 1/2 mi off the nose. It passed just left of the nose, approximately 300 ft low and 500 ft laterally at the closest point. As we started our evasive maneuver, approach gave us a pointout to the traffic. We then descended to 2500 ft and continued with an uneventful approach and landing at lax.
Original NASA ASRS Text
Title: AN ACR FLC FLYING A B737-400 AT 3000 FT MSL NEAR SMO RPTS A TCASII RA AND NMAC.
Narrative: DURING APCH TO LAX, WE WERE CLRED OUT OF 7000 FT TO 2500 FT ON A 110 DEG HDG. APPROX 8 DME FROM SMO PASSING THROUGH 3000 FT, WE RECEIVED A TCASII TFC ALERT AT 3 NM OFF THE NOSE. AT 2700 FT, THE TCASII SWITCHED TO AN RA AND COMMAND 'STOP RATE OF DSCNT.' I WAS THE PF SO I IMMEDIATELY CLICKED OFF THE AUTOPLT AND AUTOTHROTTLES, ADVANCED THE THROTTLES, AND PITCHED THE NOSE UP INTO A CLB. AS WE CLBED THROUGH 3000 FT, WE SPOTTED A LOW WING LIGHT ACFT APPROX 1/2 MI OFF THE NOSE. IT PASSED JUST L OF THE NOSE, APPROX 300 FT LOW AND 500 FT LATERALLY AT THE CLOSEST POINT. AS WE STARTED OUR EVASIVE MANEUVER, APCH GAVE US A POINTOUT TO THE TFC. WE THEN DSNDED TO 2500 FT AND CONTINUED WITH AN UNEVENTFUL APCH AND LNDG AT LAX.
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.