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ARTCC radar controller descended an aircraft through the altitude of another aircraft which resulted in less than standard separation.
| Attributes | |
| ACN | 153668 |
| Time | |
| Date | 199008 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : gnv |
| State Reference | FL |
| Altitude | msl bound lower : 26000 msl bound upper : 26000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 2 controller radar : 21 |
| ASRS Report | 153668 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | none taken : insufficient time |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 24000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I descended an aircraft from 27000' with company aircraft off side at 26000'. In my mind aircraft I descended was already below 26000'. I had just finished a busy session with numerous aircraft and in my mind, the aircraft was at 25000' before I descended.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR DESCENDED AN ACFT THROUGH THE ALT OF ANOTHER ACFT WHICH RESULTED IN LESS THAN STANDARD SEPARATION.
Narrative: I DSNDED AN ACFT FROM 27000' WITH COMPANY ACFT OFF SIDE AT 26000'. IN MY MIND ACFT I DSNDED WAS ALREADY BELOW 26000'. I HAD JUST FINISHED A BUSY SESSION WITH NUMEROUS ACFT AND IN MY MIND, THE ACFT WAS AT 25000' BEFORE I DSNDED.
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.