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ZOB ARTCC radar controller failed to notice a B757 air carrier drift off course and conflict with a descending B737.
| Attributes | |
| ACN | 591964 |
| Time | |
| Date | 200308 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : air.vor |
| State Reference | OH |
| Altitude | msl single value : 33000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 14 controller time certified in position1 : 14 |
| ASRS Report | 591964 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation non adherence : published procedure other spatial deviation |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radra mode c other controllera other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Miss Distance | horizontal : 15000 vertical : 100 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X going direct jst which was about 130+ mi from where he was going direct. Air carrier X drifted south about 8 mi where separation was lost with air carrier Y who was descending through air carrier X .it was more of an oversight on my part assuming air carrier X would fly a straight line than drift off course.
Original NASA ASRS Text
Title: ZOB ARTCC RADAR CTLR FAILED TO NOTICE A B757 ACR DRIFT OFF COURSE AND CONFLICT WITH A DSNDING B737.
Narrative: ACR X GOING DIRECT JST WHICH WAS ABOUT 130+ MI FROM WHERE HE WAS GOING DIRECT. ACR X DRIFTED S ABOUT 8 MI WHERE SEPARATION WAS LOST WITH ACR Y WHO WAS DSNDING THROUGH ACR X .IT WAS MORE OF AN OVERSIGHT ON MY PART ASSUMING ACR X WOULD FLY A STRAIGHT LINE THAN DRIFT OFF COURSE.
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.