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ZDC controller experienced operational error at FL290; unfamiliar with aircraft type eventually resulting in an over take situation; corrective action taken was too late to save legal separation.
| Attributes | |
| ACN | 814077 |
| Time | |
| Date | 200811 |
| Place | |
| Locale Reference | navaid : fay.vor |
| State Reference | NC |
| Altitude | msl single value : 29000 |
| Environment | |
| Weather Elements | Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B717 (Formerly MD-95) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | general aviation : personal |
| Make Model Name | PC-12 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 4 |
| ASRS Report | 814077 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued new clearance controller : issued alert |
| Miss Distance | horizontal : 23520 vertical : 800 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
There were tmu initiatives in effect that overloaded the sector. ZJX was routing airplanes incorrectly. I descended air carrier X to FL270. Aircraft Y was ahead of air carrier X at FL290. I was not aware aircraft Y was a pc-12. An overtake situation developed and conflict alert went off. I issued control instructions to regain separation.
Original NASA ASRS Text
Title: ZDC CONTROLLER EXPERIENCED OPERATIONAL ERROR AT FL290; UNFAMILIAR WITH AIRCRAFT TYPE EVENTUALLY RESULTING IN AN OVER TAKE SITUATION; CORRECTIVE ACTION TAKEN WAS TOO LATE TO SAVE LEGAL SEPARATION.
Narrative: THERE WERE TMU INITIATIVES IN EFFECT THAT OVERLOADED THE SECTOR. ZJX WAS ROUTING AIRPLANES INCORRECTLY. I DSNDED ACR X TO FL270. ACFT Y WAS AHEAD OF ACR X AT FL290. I WAS NOT AWARE ACFT Y WAS A PC-12. AN OVERTAKE SITUATION DEVELOPED AND CONFLICT ALERT WENT OFF. I ISSUED CTL INSTRUCTIONS TO REGAIN SEPARATION.
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.