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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier came in close proximity to another IFR aircraft.
| Attributes | |
| ACN | 123206 |
| Time | |
| Date | 198909 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : cvg |
| State Reference | OH |
| Altitude | msl bound lower : 11000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : non radar |
| Qualification | controller : developmental |
| Experience | controller non radar : 1 |
| ASRS Report | 123206 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : handoff position |
| Qualification | controller : radar |
| Experience | controller radar : 3 |
| ASRS Report | 123552 |
| Events | |
| Anomaly | non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 8400 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X and a general aviation flight were head-on at 11,000. Air carrier X departed cvg and climbed to 11,000 nebnd. The general aviation aircraft was swbnd at 11,000 when the data block timed out, which I believe was a major factor in the separation error. I was the manual controller at the cvg lo sector. When the error happened I was on the landline coordinating releases for departures of cvg, day, and cmh. The sector was very busy and we were using a tracker. Supplemental information from acn 123552: I put pvd J ball around air carrier X. Controller knew radar separation was diminishing rapidly. I told him to turn the aircraft. Air carrier X was turned east to 090 degree. Small aircraft Y was in second 360 degree turn of which he made a left turn into air carrier X.
Original NASA ASRS Text
Title: ACR CAME IN CLOSE PROX TO ANOTHER IFR ACFT.
Narrative: ACR X AND A GENERAL AVIATION FLT WERE HEAD-ON AT 11,000. ACR X DEPARTED CVG AND CLIMBED TO 11,000 NEBND. THE GENERAL AVIATION ACFT WAS SWBND AT 11,000 WHEN THE DATA BLOCK TIMED OUT, WHICH I BELIEVE WAS A MAJOR FACTOR IN THE SEPARATION ERROR. I WAS THE MANUAL CTLR AT THE CVG LO SECTOR. WHEN THE ERROR HAPPENED I WAS ON THE LANDLINE COORDINATING RELEASES FOR DEPS OF CVG, DAY, AND CMH. THE SECTOR WAS VERY BUSY AND WE WERE USING A TRACKER. SUPPLEMENTAL INFORMATION FROM ACN 123552: I PUT PVD J BALL AROUND ACR X. CTLR KNEW RADAR SEPARATION WAS DIMINISHING RAPIDLY. I TOLD HIM TO TURN THE ACFT. ACR X WAS TURNED E TO 090 DEG. SMA Y WAS IN SECOND 360 DEG TURN OF WHICH HE MADE A LEFT TURN INTO ACR X.
Data retrieved from NASA's ASRS site as of August 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.