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ZID controller described a conflict event when he/she descended an air carrier into airspace that had just been released to another controller.
| Attributes | |
| ACN | 862451 |
| Time | |
| Date | 200912 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZID.ARTCC |
| State Reference | IN |
| Aircraft 1 | |
| Make Model Name | Medium Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Airspace Violation All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy |
Narrative:
I was working dac im sector and flm hi sector combined at dac im. There was a lot of turbulence in the area at all altitudes. I had a regional jet at FL350 and had just completed a sector split with flm hi. A couple of minutes after the split; the rj requested lower; I assigned the aircraft FL270 and they started down. I then was asked if I wanted a break. During the relief briefing I referenced rj descending for a better ride. After putting my headset away I saw the rj start flashing conflict alert with another aircraft. I walked over as the new dac im controller was issuing a turn to rj to avoid an aircraft descending to FL240 inbound to cvg. The controller at flm hi stopped the descending aircraft at FL280 and separation was never compromised. After a short discussion I realized that I had descended the rj into flm hi's airspace after I had released the airspace to them. I should be more vigilant in the time just after combining and de-combining positions. Possibly some software could be added to make the altitude in a data block change color when a controller enters an altitude other than one in their airspace.
Original NASA ASRS Text
Title: ZID controller described a conflict event when he/she descended an air carrier into airspace that had just been released to another controller.
Narrative: I was working DAC IM sector and FLM HI sector combined at DAC IM. There was a lot of turbulence in the area at all altitudes. I had a Regional Jet at FL350 and had just completed a sector split with FLM HI. A couple of minutes after the split; the RJ requested lower; I assigned the aircraft FL270 and they started down. I then was asked if I wanted a break. During the relief briefing I referenced RJ descending for a better ride. After putting my headset away I saw the RJ start flashing conflict alert with another aircraft. I walked over as the new DAC IM controller was issuing a turn to RJ to avoid an aircraft descending to FL240 inbound to CVG. The controller at FLM HI stopped the descending aircraft at FL280 and separation was never compromised. After a short discussion I realized that I had descended the RJ into FLM HI's airspace after I had released the airspace to them. I should be more vigilant in the time just after combining and De-combining positions. Possibly some software could be added to make the altitude in a data block change color when a controller enters an altitude other than one in their airspace.
Data retrieved from NASA's ASRS site as of April 2012 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.