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Radar separation was lost between 2 arrival aircraft as they were being transferred from ARTCC radar controller to approach controller.
| Attributes | |
| ACN | 153870 |
| Time | |
| Date | 199008 |
| Day | Mon |
| Place | |
| Locale Reference | atc facility : tlh |
| State Reference | FL |
| Altitude | msl bound lower : 10000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx tracon : thl |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller military : 8 controller radar : 1 |
| ASRS Report | 153870 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 13900 vertical : 400 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Inter Facility Coordination Failure Operational Error |
Narrative:
Small transport X handed off at 11000' and small transport Y handed off at 10000'. Small transport X was descended and it appeared that sep was going to be lost because small transport Y was overtaking small transport X and the small transport Y was inside my airspace, but not on frequency. I turned the small transport X to ensure sep, even though the small transport X was not in my vertical airspace. The center in charge allowed small transport Y to turn in my airspace resulting in less than standard separation.
Original NASA ASRS Text
Title: RADAR SEPARATION WAS LOST BETWEEN 2 ARR ACFT AS THEY WERE BEING TRANSFERRED FROM ARTCC RADAR CTLR TO APCH CTLR.
Narrative: SMT X HANDED OFF AT 11000' AND SMT Y HANDED OFF AT 10000'. SMT X WAS DSNDED AND IT APPEARED THAT SEP WAS GOING TO BE LOST BECAUSE SMT Y WAS OVERTAKING SMT X AND THE SMT Y WAS INSIDE MY AIRSPACE, BUT NOT ON FREQ. I TURNED THE SMT X TO ENSURE SEP, EVEN THOUGH THE SMT X WAS NOT IN MY VERT AIRSPACE. THE CENTER IN CHARGE ALLOWED SMT Y TO TURN IN MY AIRSPACE RESULTING IN LTSS.
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.