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Air carrier was avoiding thunderstorm activity and conflicted with an opposite direction air carrier.
| Attributes | |
| ACN | 113845 |
| Time | |
| Date | 198906 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : ctr |
| State Reference | MA |
| Altitude | msl bound lower : 25000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 4 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 113845 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : weather non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X swbnd at FL250, and air carrier Y climbing nebnd. Apparent tracks would have had lateral separation but due to WX avoidance, courses changed resulting in loss of separation.
Original NASA ASRS Text
Title: ACR WAS AVOIDING TSTM ACTIVITY AND CONFLICTED WITH AN OPPOSITE DIRECTION ACR.
Narrative: ACR X SWBND AT FL250, AND ACR Y CLIMBING NEBND. APPARENT TRACKS WOULD HAVE HAD LATERAL SEPARATION BUT DUE TO WX AVOIDANCE, COURSES CHANGED RESULTING IN LOSS OF SEPARATION.
Data retrieved from NASA's ASRS site as of August 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.