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An air carrier crew received a TCAS RA from an high winged aircraft near bfi as they were on approach to sea runway 16C at 1;900 ft.
| Attributes | |
| ACN | 856698 |
| Time | |
| Date | 200910 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | SEA.Airport |
| State Reference | WA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Cessna Single Piston Undifferentiated or Other Model |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Experience | Flight Crew Last 90 Days 140 Flight Crew Total 12000 Flight Crew Type 5200 |
| Events | |
| Anomaly | Conflict NMAC |
| Miss Distance | Horizontal 0 Vertical 200 |
Narrative:
While flying the ILS 16C at sea; traffic from bfi crossed our flight path on a northwest heading and well below us by more than 1000 feet. The high-winged cessna then circled to the left and again crossed our flight path near sodoe; this time causing a TCAS TA followed by an RA. The first officer visually acquired the aircraft and complied with the TCAS RA (monitor vertical speed; which was commanding a maximum descent rate nearly identical to the GS descent rate). The aircraft passed slightly below and to the right and then behind our A319. TCAS showed a vertical separation of 500 to 200 feet during the RA. After the TCAS 'clear of contact'; we asked the seatac tower about the traffic and they responded that is was 'behind us and no factor.' I contacted the seattle TRACON to ask about the traffic.
Original NASA ASRS Text
Title: An Air Carrier crew received a TCAS RA from an high winged aircraft near BFI as they were on approach to SEA Runway 16C at 1;900 FT.
Narrative: While flying the ILS 16C at SEA; traffic from BFI crossed our flight path on a NW heading and well below us by more than 1000 feet. The high-winged Cessna then circled to the left and again crossed our flight path near SODOE; this time causing a TCAS TA followed by an RA. The First Officer visually acquired the aircraft and complied with the TCAS RA (monitor vertical speed; which was commanding a maximum descent rate nearly identical to the GS descent rate). The aircraft passed slightly below and to the right and then behind our A319. TCAS showed a vertical separation of 500 to 200 feet during the RA. After the TCAS 'CLEAR OF CONTACT'; we asked the SEATAC tower about the traffic and they responded that is was 'Behind us and no factor.' I contacted the Seattle TRACON to ask about the traffic.
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.