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Bfi tower controller and S46 TRACON departure controller reported a near midair collision between a bfi IFR departure and a VFR aircraft transitioning through bfi's departure corridor.
| Attributes | |
| ACN | 1518910 |
| Time | |
| Date | 201802 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | BFI.Tower |
| State Reference | WA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Small Aircraft High Wing 1 Eng Fixed Gear |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Route In Use | VFR Route |
| Flight Plan | VFR |
| Aircraft 2 | |
| Make Model Name | Small Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Climb |
| Person 1 | |
| Function | Other / Unknown |
| Qualification | Air Traffic Control Fully Certified |
| Person 2 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 4 |
| Events | |
| Anomaly | ATC Issue All Types Conflict NMAC Deviation - Procedural Published Material / Policy |
Narrative:
Sea tower apreq (approval request) aircraft X direct to renton. Local control; who answered the shout line; approved the route. Shortly after the local controller departed aircraft Y and shipped them to TRACON departure control without calling traffic on aircraft X. The two aircraft passed each other less than 1/4 mile and the same altitude. Aircraft Y filed a near midair collision with S46. The sea local controller was aware of the traffic but still issued the takeoff clearance and did not issue a traffic call.
Original NASA ASRS Text
Title: BFI Tower Controller and S46 TRACON Departure Controller reported a NMAC between a BFI IFR departure and a VFR aircraft transitioning through BFI's departure corridor.
Narrative: SEA Tower ApReq (Approval Request) Aircraft X direct to Renton. Local Control; who answered the shout line; approved the route. Shortly after the Local Controller departed Aircraft Y and shipped them to TRACON Departure Control without calling traffic on Aircraft X. The two aircraft passed each other less than 1/4 mile and the same altitude. Aircraft Y filed a NMAC with S46. The SEA Local Controller was aware of the traffic but still issued the takeoff clearance and did not issue a traffic call.
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.