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While descending to 3;000 ft MSL; widebody transport first officer reported following TCAS RA prior to a near midair collision with a C172.
| Attributes | |
| ACN | 824279 |
| Time | |
| Date | 200902 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | SUU.Airport |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft |
| Operating Under FAR Part | Part 91 |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 6500 Flight Crew Type 1200 |
| Events | |
| Anomaly | Conflict NMAC |
Narrative:
While descending to 3;000 ft MSL; while being vectored by approach for landing; we were advised of unidentified traffic ahead and below us. Upon approaching 3;500 ft MSL on a vector we received a TCAS advisory to traffic directly below us climbing. We leveled off at our current altitude. Moments later; we observed the traffic climbing still on the TCAS window and the TCAS system issued an RA to 'climb.' we complied with the RA performing an immediate maximum climb to 6;000 ft. Estimated distance at the time the climb and RA were initiated was 300 ft directly above the conflict aircraft. It was reported later by another aircraft that the conflict traffic was a small aircraft. We never saw the traffic and were vectored around the aircraft back to the final approach course for the ILS/visual approach. The remaining approach and landing was uneventful.
Original NASA ASRS Text
Title: While descending to 3;000 FT MSL; widebody transport First Officer reported following TCAS RA prior to a NMAC with a C172.
Narrative: While descending to 3;000 FT MSL; while being vectored by Approach for landing; we were advised of unidentified traffic ahead and below us. Upon approaching 3;500 FT MSL on a vector we received a TCAS advisory to traffic directly below us climbing. We leveled off at our current altitude. Moments later; we observed the traffic climbing still on the TCAS window and the TCAS system issued an RA to 'climb.' We complied with the RA performing an immediate maximum climb to 6;000 FT. Estimated distance at the time the climb and RA were initiated was 300 FT directly above the conflict aircraft. It was reported later by another aircraft that the conflict traffic was a small aircraft. We never saw the traffic and were vectored around the aircraft back to the final approach course for the ILS/visual approach. The remaining approach and landing was uneventful.
Data retrieved from NASA's ASRS site as of April 2012 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.