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ZOB controller reported operational error at FL220 when coordination between adjacent ZOB and ZID handoff controller's became confused and separation was lost.
| Attributes | |
| ACN | 694505 |
| Time | |
| Date | 200604 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : fwa.airport |
| State Reference | IN |
| Altitude | msl single value : 22000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Thunderstorm Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| ASRS Report | 694505 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : handoff position |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 12600 vertical : 600 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 was descended to avoid head-on traffic. Aircraft #2 was with another center at FL230. Aircraft #1 was level at FL220 and handed off to another sector. Aircraft #2 was then descended and separation was lost. D-side was used for coordination. There was a misunderstanding in coordination between ZID and d-side.
Original NASA ASRS Text
Title: ZOB CTLR RPTED OPERROR AT FL220 WHEN COORD BTWN ADJACENT ZOB AND ZID HDOF CTLR'S BECAME CONFUSED AND SEPARATION WAS LOST.
Narrative: ACFT #1 WAS DSNDED TO AVOID HEAD-ON TFC. ACFT #2 WAS WITH ANOTHER CTR AT FL230. ACFT #1 WAS LEVEL AT FL220 AND HANDED OFF TO ANOTHER SECTOR. ACFT #2 WAS THEN DSNDED AND SEPARATION WAS LOST. D-SIDE WAS USED FOR COORD. THERE WAS A MISUNDERSTANDING IN COORD BTWN ZID AND D-SIDE.
Data retrieved from NASA's ASRS site as of January 2009 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.