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ZBW radar assoc controller witnessed operational error at FL360 when controller failed to allow enough distance during opposite direction descent operations.
| Attributes | |
| ACN | 777296 |
| Time | |
| Date | 200803 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : cmk.vor |
| State Reference | NY |
| Altitude | msl single value : 36000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : charter |
| Make Model Name | Falcon 900 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : handoff position instruction : instructor |
| Qualification | controller : radar |
| Experience | controller radar : 18 |
| ASRS Report | 777296 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Miss Distance | horizontal : 22800 vertical : 0 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Northbound B737 FL370. Sbound F900 FL360. Radar controller descended FL370 to FL350. Not enough room. Human error.
Original NASA ASRS Text
Title: ZBW RADAR ASSOC CTLR WITNESSED OPERROR AT FL360 WHEN CTLR FAILED TO ALLOW ENOUGH DISTANCE DURING OPPOSITE DIRECTION DESCENT OPS.
Narrative: NBOUND B737 FL370. SBOUND F900 FL360. RADAR CTLR DSNDED FL370 TO FL350. NOT ENOUGH ROOM. HUMAN ERROR.
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.