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ARTCC radar controller has less than standard separation between air carrier medium large transport descending on arrival route and an enroute mlt.
| Attributes | |
| ACN | 170979 |
| Time | |
| Date | 199102 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : esl |
| State Reference | WV |
| Altitude | msl bound lower : 19500 msl bound upper : 20000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc tower : stl |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | arrival other enroute airway : zdc |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Military Transport |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 23 |
| ASRS Report | 170299 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 18000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Medium large transport X was inbound to dca on the bucko 3 arrival with a clearance to cross druzz at 15000'. Mlt Y at FL200 was swbnd on J6 with a radar handoff to R5 with the xfer of communications completed. At about CA22 I observed the C/a between the 2 aircraft. At about XA23 I turned medium large transport X 15 degrees left to ensure sep. Because of medium large transport X ground speed, the turn was insufficient and sep was lost.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR HAS LESS THAN STANDARD SEPARATION BETWEEN ACR MLG DESCENDING ON ARR ROUTE AND AN ENROUTE MLT.
Narrative: MLG X WAS INBND TO DCA ON THE BUCKO 3 ARR WITH A CLRNC TO CROSS DRUZZ AT 15000'. MLT Y AT FL200 WAS SWBND ON J6 WITH A RADAR HDOF TO R5 WITH THE XFER OF COMS COMPLETED. AT ABOUT CA22 I OBSERVED THE C/A BTWN THE 2 ACFT. AT ABOUT XA23 I TURNED MLG X 15 DEGS LEFT TO ENSURE SEP. BECAUSE OF MLG X GND SPD, THE TURN WAS INSUFFICIENT AND SEP WAS LOST.
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.