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ZDC ARTCC radar controller misjudges aircraft closure rate between a DC9 and a CL60 resulting in a loss of separation.
| Attributes | |
| ACN | 536236 |
| Time | |
| Date | 200201 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bal.airport |
| State Reference | MD |
| Altitude | msl single value : 17000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | other |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| 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 : 11 controller time certified in position1 : 2 |
| ASRS Report | 536236 |
| Person 2 | |
| Affiliation | government : military |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radar aircraft equipment : tcas other controllera other flight crewa other flight crewb |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : investigated |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft eastbound at 17000 ft. Other aircraft nwbound descending for crossing restr, leaving FL200 for 15000 ft.
Original NASA ASRS Text
Title: ZDC ARTCC RADAR CTLR MISJUDGES ACFT CLOSURE RATE BTWN A DC9 AND A CL60 RESULTING IN A LOSS OF SEPARATION.
Narrative: ACFT EBOUND AT 17000 FT. OTHER ACFT NWBOUND DSNDING FOR XING RESTR, LEAVING FL200 FOR 15000 FT.
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.