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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier Y descent to occupied altitude had less than standard separation from air carrier X. System error.
| Attributes | |
| ACN | 294709 |
| Time | |
| Date | 199501 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : djb |
| State Reference | OH |
| Altitude | msl bound lower : 22000 msl bound upper : 22000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob artcc : zme |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 294709 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| 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 : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 23400 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Was reasonably busy at the time of the event. Had air carrier X, a dtw arrival at FL220, that needed to be spaced with dtw transitioning from a high altitude sector. Issued FL220 to descending traffic Y after looking and seeing that FL220 X was the traffic. I didn't say what I meant to.
Original NASA ASRS Text
Title: ACR Y DSCNT TO OCCUPIED ALT HAD LTSS FROM ACR X. SYS ERROR.
Narrative: WAS REASONABLY BUSY AT THE TIME OF THE EVENT. HAD ACR X, A DTW ARR AT FL220, THAT NEEDED TO BE SPACED WITH DTW TRANSITIONING FROM A HIGH ALT SECTOR. ISSUED FL220 TO DSNDING TFC Y AFTER LOOKING AND SEEING THAT FL220 X WAS THE TFC. I DIDN'T SAY WHAT I MEANT TO.
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.