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Emb-170 captain reported an RA with traffic on a nonstandard departure from bfi.
| Attributes | |
| ACN | 1565658 |
| Time | |
| Date | 201808 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | SEA.Airport |
| State Reference | WA |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 170/175 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | Climb |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Conflict Airborne Conflict |
Narrative:
On approach to 16R at sea; clear; VMC; just prior to 1;000 feet AGL; we received a TCAS TA; then a momentary RA. This was caused by a single engine prop departing bfi. They made right downwind departure; which I think is not normal. This caused them to be closer to the arrival path into sea. I saw the traffic at our 7-8 o'clock position before the RA. Traffic was well behind us and proceeding behind our path. We got the RA for about 5 seconds to monitor vertical speed. The first officer; pilot flying; followed the RA. After; we were able to continue the approach on glide slope with no issues. Reported the event to sea tower on approach. Right downwind departure from bfi should not be allowed when aircraft are landing 16's to sea. Even if they remain low; the rate of climb will trigger an RA possible with traffic on approach to 16; as [it] did to us.
Original NASA ASRS Text
Title: EMB-170 Captain reported an RA with traffic on a nonstandard departure from BFI.
Narrative: On approach to 16R at SEA; clear; VMC; just prior to 1;000 feet AGL; we received a TCAS TA; then a momentary RA. This was caused by a single engine prop departing BFI. They made right downwind departure; which I think is not normal. This caused them to be closer to the arrival path into SEA. I saw the traffic at our 7-8 o'clock position before the RA. Traffic was well behind us and proceeding behind our path. We got the RA for about 5 seconds to monitor vertical speed. The First Officer; pilot flying; followed the RA. After; we were able to continue the approach on Glide Slope with no issues. Reported the event to SEA Tower on approach. Right downwind departure from BFI should not be allowed when aircraft are landing 16's to SEA. Even if they remain low; the rate of climb will trigger an RA possible with traffic on approach to 16; as [it] did to us.
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.