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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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ZID radar controller handling air carrier traffic on converging courses descends one through the altitude of the other.
| Attributes | |
| ACN | 603932 |
| Time | |
| Date | 200312 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : iiu.vortac |
| State Reference | KY |
| Altitude | msl single value : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 2.5 |
| ASRS Report | 603932 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radar/mode c other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 27000 vertical : 1500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X was turned 15 degree right for up coming descent. Air carrier Y was also turned 15 degree right. Air carrier X was descended to FL330, vectors hadn't completely taken effect. Air carrier X read back FL230. The readback was corrected, then I looked away from the scope to make a note of the readback. A call then came in from another sector about another aircraft. When my scan came back, I realized I did not have separation. Air carrier X was then turned to a 040 degree heading, air carrier Y was turned to a 250 degree heading. Separation was not saved.
Original NASA ASRS Text
Title: ZID RADAR CTLR HANDLING ACR TFC ON CONVERGING COURSES DSNDS ONE THROUGH THE ALT OF THE OTHER.
Narrative: ACR X WAS TURNED 15 DEG R FOR UP COMING DSCNT. ACR Y WAS ALSO TURNED 15 DEG R. ACR X WAS DSNDED TO FL330, VECTORS HADN'T COMPLETELY TAKEN EFFECT. ACR X READ BACK FL230. THE READBACK WAS CORRECTED, THEN I LOOKED AWAY FROM THE SCOPE TO MAKE A NOTE OF THE READBACK. A CALL THEN CAME IN FROM ANOTHER SECTOR ABOUT ANOTHER ACFT. WHEN MY SCAN CAME BACK, I REALIZED I DID NOT HAVE SEPARATION. ACR X WAS THEN TURNED TO A 040 DEG HDG, ACR Y WAS TURNED TO A 250 DEG HDG. SEPARATION WAS NOT SAVED.
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.