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While responding to a RA after takeoff from sea; a B737 had a near midair collision with an unseen aircraft controled by another controller.
| Attributes | |
| ACN | 805048 |
| Time | |
| Date | 200809 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sea.airport |
| State Reference | WA |
| Altitude | msl single value : 1200 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : s46.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial climbout : takeoff |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : s46.tracon |
| Operator | other |
| Make Model Name | Galaxy (C5A) |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 189 |
| ASRS Report | 805048 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 77 flight time type : 1660 |
| ASRS Report | 805054 |
| Events | |
| Anomaly | conflict : nmac non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | flight crew : took evasive action flight crew : exited adverse environment |
| Miss Distance | vertical : 300 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
Took off behind another carrier B757 'heavy' with additional wake turbulence distance. After gear came up and less than 1000 ft AGL (flaps still in position 5) we received a TA alert. Traffic was 11 O'clock position with less than 2 mi at 2000 ft MSL. Rapidly received an RA with a 'climb crossing climb.' arc on ivsi showed red except for 4000-5000 ft small green band. Told ATC about RA and used extra power and continued to climb IMC and missed aircraft by what I guess was less than 300 ft. Asked ATC about the control of the other aircraft and was informed that it was under control of another departure controller. Informed the controller that it wasn't very good. (My feelings at the time was they tried to fit e-w traffic from boeing field between the B757 and us and cut it way too close.) ATC needs to understand closure rates near miss.
Original NASA ASRS Text
Title: WHILE RESPONDING TO A RA AFTER TKOF FROM SEA; A B737 HAD A NMAC WITH AN UNSEEN ACFT CTLED BY ANOTHER CTLR.
Narrative: TOOK OFF BEHIND ANOTHER CARRIER B757 'HVY' WITH ADDITIONAL WAKE TURB DISTANCE. AFTER GEAR CAME UP AND LESS THAN 1000 FT AGL (FLAPS STILL IN POS 5) WE RECEIVED A TA ALERT. TFC WAS 11 O'CLOCK POS WITH LESS THAN 2 MI AT 2000 FT MSL. RAPIDLY RECEIVED AN RA WITH A 'CLB XING CLB.' ARC ON IVSI SHOWED RED EXCEPT FOR 4000-5000 FT SMALL GREEN BAND. TOLD ATC ABOUT RA AND USED EXTRA PWR AND CONTINUED TO CLB IMC AND MISSED ACFT BY WHAT I GUESS WAS LESS THAN 300 FT. ASKED ATC ABOUT THE CTL OF THE OTHER ACFT AND WAS INFORMED THAT IT WAS UNDER CTL OF ANOTHER DEP CTLR. INFORMED THE CTLR THAT IT WASN'T VERY GOOD. (MY FEELINGS AT THE TIME WAS THEY TRIED TO FIT E-W TFC FROM BOEING FIELD BTWN THE B757 AND US AND CUT IT WAY TOO CLOSE.) ATC NEEDS TO UNDERSTAND CLOSURE RATES NEAR MISS.
Data retrieved from NASA's ASRS site as of May 2009 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.