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Air carrier questioned S46 controller's sequencing procedures when following heavy aircraft was vectored to land ahead of reporter's B737.
| Attributes | |
| ACN | 765308 |
| Time | |
| Date | 200712 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : s46.tracon |
| State Reference | WA |
| Altitude | msl single value : 5000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : s46.tracon tower : bur.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-900 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : traffic pattern arrival star : chins |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : s46.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : traffic pattern arrival star : chins |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 200 flight time type : 3600 |
| ASRS Report | 765308 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
Flying chins STAR. B777 was behind us. On downwind; ATC took us north and vectored the B777 inside us; so as to put us behind a heavy. This created a hazardous situation that had not previously existed. Obviously there are times we have to follow heavies. However to give the heavy priority and put us in such a position deliberately is unacceptable. Keep aircraft in sequence and/or try to keep the heavy behind the smaller aircraft when ETA's are close.
Original NASA ASRS Text
Title: ACR QUESTIONED S46 CTLR'S SEQUENCING PROCS WHEN FOLLOWING HVY ACFT WAS VECTORED TO LAND AHEAD OF REPORTER'S B737.
Narrative: FLYING CHINS STAR. B777 WAS BEHIND US. ON DOWNWIND; ATC TOOK US N AND VECTORED THE B777 INSIDE US; SO AS TO PUT US BEHIND A HVY. THIS CREATED A HAZARDOUS SITUATION THAT HAD NOT PREVIOUSLY EXISTED. OBVIOUSLY THERE ARE TIMES WE HAVE TO FOLLOW HEAVIES. HOWEVER TO GIVE THE HVY PRIORITY AND PUT US IN SUCH A POS DELIBERATELY IS UNACCEPTABLE. KEEP ACFT IN SEQUENCE AND/OR TRY TO KEEP THE HVY BEHIND THE SMALLER ACFT WHEN ETA'S ARE CLOSE.
Data retrieved from NASA's ASRS site as of January 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.