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An aircraft was descended to a lower altitude which resulted in less than standard separation with an aircraft at a lower altitude.
| Attributes | |
| ACN | 155654 |
| Time | |
| Date | 199010 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : mys |
| State Reference | KY |
| Altitude | msl bound lower : 16000 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid artcc : zla |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 6 |
| ASRS Report | 155654 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : developmental controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | none taken : unable |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 21000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Small aircraft was southbound off sdf level at 16000', mys direct bwg and was very slow. An small transport was cct direct ewo landing at lou at 17000'. Radar trnee descended small transport to 11000' and forgot about the small aircraft and latitude sep was lost before vertical sep was achieved.
Original NASA ASRS Text
Title: AN ACFT WAS DESCENDED TO A LOWER ALT WHICH RESULTED IN LESS THAN STANDARD SEPARATION WITH AN ACFT AT A LOWER ALT.
Narrative: SMA WAS SBND OFF SDF LEVEL AT 16000', MYS DIRECT BWG AND WAS VERY SLOW. AN SMT WAS CCT DIRECT EWO LNDG AT LOU AT 17000'. RADAR TRNEE DSNDED SMT TO 11000' AND FORGOT ABOUT THE SMA AND LAT SEP WAS LOST BEFORE VERT SEP WAS ACHIEVED.
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.