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Airbus 321 crew instructed by an S46 controller to maintain visual separation from a commuter aircraft while in a turn to final belly up to the traffic.
| Attributes | |
| ACN | 562772 |
| Time | |
| Date | 200210 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sea.airport |
| State Reference | WA |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A321 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | approach : visual arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : s46.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : visual arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 120 flight time type : 420 |
| ASRS Report | 562772 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : multi engine pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 19000 flight time type : 1500 |
| ASRS Report | 562769 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : radar aircraft equipment : tcas other controllera other flight crewa other flight crewb other other : 3 |
| Resolutory Action | flight crew : took evasive action other |
| Miss Distance | horizontal : 1500 vertical : 200 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
Turned from right downwind runway 34R by approach to base to 'mall visual approach,' inside of commuter, also on right base to his runway 34L (parallel approach). They descended from 1000 ft above to our altitude, while we were belly up in turn. Received an RA 'climb, crossing, climb.' captain flying, responded from descent to climb, only reversed 200 ft clear of conflict. Continued approach having us turn belly up with overshooting wind at night was very dangerous. Had the approach for each aircraft been from a dogleg from their own side, no problems, but both aircraft turning final from same base is an accident waiting to happen.
Original NASA ASRS Text
Title: AIRBUS 321 CREW INSTRUCTED BY AN S46 CTLR TO MAINTAIN VISUAL SEPARATION FROM A COMMUTER ACFT WHILE IN A TURN TO FINAL BELLY UP TO THE TFC.
Narrative: TURNED FROM R DOWNWIND RWY 34R BY APCH TO BASE TO 'MALL VISUAL APCH,' INSIDE OF COMMUTER, ALSO ON R BASE TO HIS RWY 34L (PARALLEL APCH). THEY DSNDED FROM 1000 FT ABOVE TO OUR ALT, WHILE WE WERE BELLY UP IN TURN. RECEIVED AN RA 'CLB, XING, CLB.' CAPT FLYING, RESPONDED FROM DSCNT TO CLB, ONLY REVERSED 200 FT CLR OF CONFLICT. CONTINUED APCH HAVING US TURN BELLY UP WITH OVERSHOOTING WIND AT NIGHT WAS VERY DANGEROUS. HAD THE APCH FOR EACH ACFT BEEN FROM A DOGLEG FROM THEIR OWN SIDE, NO PROBS, BUT BOTH ACFT TURNING FINAL FROM SAME BASE IS AN ACCIDENT WAITING TO HAPPEN.
Data retrieved from NASA's ASRS site as of July 2007 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.