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A departing commuter aircraft has a conflict with an opposite direction air carrier resulting in less than standard separation.
| Attributes | |
| ACN | 256624 |
| Time | |
| Date | 199311 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sea |
| State Reference | WA |
| Altitude | msl bound lower : 4600 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sea artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : initial |
| Route In Use | departure other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | controller radar : 11 flight time last 90 days : 300 flight time total : 7000 |
| ASRS Report | 256624 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 5000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Loss of separation by controller error. We were climbing out of 4600 ft for 5000 ft on a radar vector of 020 when approach control told us to maintain 4500 ft. At that time we saw an air carrier Y, an medium large transport at our 11 O'clock position and about 1 mi away and coming toward us (white aircraft coming from a white backgnd). The controller then said, 'descend immediately to 4000 ft.' we advise him we had the aircraft in sight and were descending. The workload had increased rapidly for the controller due to fog and several aircraft missed approachs. If there was any on the job training going on during any of this, we never heard another voice. Where was the conflict alert?
Original NASA ASRS Text
Title: A DEPARTING COMMUTER ACFT HAS A CONFLICT WITH AN OPPOSITE DIRECTION ACR RESULTING IN LTSS.
Narrative: LOSS OF SEPARATION BY CTLR ERROR. WE WERE CLBING OUT OF 4600 FT FOR 5000 FT ON A RADAR VECTOR OF 020 WHEN APCH CTL TOLD US TO MAINTAIN 4500 FT. AT THAT TIME WE SAW AN ACR Y, AN MLG AT OUR 11 O'CLOCK POS AND ABOUT 1 MI AWAY AND COMING TOWARD US (WHITE ACFT COMING FROM A WHITE BACKGND). THE CTLR THEN SAID, 'DSND IMMEDIATELY TO 4000 FT.' WE ADVISE HIM WE HAD THE ACFT IN SIGHT AND WERE DSNDING. THE WORKLOAD HAD INCREASED RAPIDLY FOR THE CTLR DUE TO FOG AND SEVERAL ACFT MISSED APCHS. IF THERE WAS ANY ON THE JOB TRAINING GOING ON DURING ANY OF THIS, WE NEVER HEARD ANOTHER VOICE. WHERE WAS THE CONFLICT ALERT?
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.