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ARTCC controller apparently did not notice aircraft turn to avoid WX and conflicted with an aircraft on a parallel route.
| Attributes | |
| ACN | 410965 |
| Time | |
| Date | 199808 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : den |
| State Reference | CO |
| Altitude | msl bound lower : 17000 msl bound upper : 17000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv tracon : row |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Learjet 25 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 15 controller supervisory : 5 |
| ASRS Report | 410965 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance none taken : detected after the fact |
| Consequence | Other |
| Miss Distance | horizontal : 18000 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Numerous deviations in sector. Aircraft X (turboprop) descended to 16000 ft. Aircraft turned off arrival route due to WX. Did not inform ATC of deviation. Conflicted with aircraft Y on parallel arrival route. Contributing factor to situation was that no WX data displayable in sector. ATC's not able to anticipate what aircraft might do.
Original NASA ASRS Text
Title: ARTCC CTLR APPARENTLY DID NOT NOTICE ACFT TURN TO AVOID WX AND CONFLICTED WITH AN ACFT ON A PARALLEL RTE.
Narrative: NUMEROUS DEVS IN SECTOR. ACFT X (TURBOPROP) DSNDED TO 16000 FT. ACFT TURNED OFF ARR RTE DUE TO WX. DID NOT INFORM ATC OF DEV. CONFLICTED WITH ACFT Y ON PARALLEL ARR RTE. CONTRIBUTING FACTOR TO SIT WAS THAT NO WX DATA DISPLAYABLE IN SECTOR. ATC'S NOT ABLE TO ANTICIPATE WHAT ACFT MIGHT DO.
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.