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An air carrier pilot reported a TCAS RA climb during a near miss with an unidentified aircraft at about 5;500 feet near sli .
| Attributes | |
| ACN | 1443061 |
| Time | |
| Date | 201704 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | SCT.TRACON |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | Airbus 318/319/320/321 Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Events | |
| Anomaly | ATC Issue All Types Conflict NMAC Deviation - Altitude Excursion From Assigned Altitude |
Narrative:
At 5000 MSL feet; approximately 10 miles west of sli VOR; socal approach assigned us a left turn to a heading of 050 degrees. The captain initiated the turn with the autopilot engaged. Approximately 15-20 degrees into the left turn; socal approach quickly cleared us back to our original heading. As the aircraft was in the right turn back to approximately 070 degrees; we received a resolution advisory (RA) directing a climb; as it appeared that an aircraft was in close proximity to us at approximately 500' below our assigned altitude. The captain immediately followed the RA direction and began to climb; and I promptly notified socal approach that we were responding to a RA. At approximately 5500 MSL feet; the RA indicated a level off. A few seconds later; we received a subsequent RA directing another climb; however; it now it appeared that the aircraft was 300' directly beneath us. At approximately 5700' MSL; the RA indicated that we were clear of the conflict. The captain returned to the previously assigned altitude of 5000' MSL and I notified socal approach accordingly. Socal approach never made any mention of any traffic or the RA event. Also; we never saw the offending traffic during the RA event. We continued and landed uneventfully.
Original NASA ASRS Text
Title: An air carrier pilot reported a TCAS RA CLIMB during a near miss with an unidentified aircraft at about 5;500 feet near SLI .
Narrative: At 5000 MSL feet; approximately 10 miles west of SLI VOR; SoCal Approach assigned us a left turn to a heading of 050 degrees. The Captain initiated the turn with the autopilot engaged. Approximately 15-20 degrees into the left turn; SoCal Approach quickly cleared us back to our original heading. As the aircraft was in the right turn back to approximately 070 degrees; we received a resolution advisory (RA) directing a climb; as it appeared that an aircraft was in close proximity to us at approximately 500' below our assigned altitude. The captain immediately followed the RA direction and began to climb; and I promptly notified SoCal Approach that we were responding to a RA. At approximately 5500 MSL feet; the RA indicated a level off. A few seconds later; we received a subsequent RA directing another climb; however; it now it appeared that the aircraft was 300' directly beneath us. At approximately 5700' MSL; the RA indicated that we were clear of the conflict. The captain returned to the previously assigned altitude of 5000' MSL and I notified SoCal Approach accordingly. SoCal approach never made any mention of any traffic or the RA event. Also; we never saw the offending traffic during the RA event. We continued and landed uneventfully.
Data retrieved from NASA's ASRS site 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.