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ZID controller reports of flight break up and issuing descent clearance to wrong aircraft and then having a loss of separation. Flm reports that he was distracted from the operation by doing other flm duties and did not hear the controller was having a flight break up.
| Attributes | |
| ACN | 1168108 |
| Time | |
| Date | 201405 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZID.ARTCC |
| State Reference | IN |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Light Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Light Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 13 |
| Person 2 | |
| Function | Enroute Supervisor / CIC |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 7 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Published Material / Policy |
Narrative:
Aircraft X was a flight of 2 [light transport; low wing; 2 turbojet aircraft] and asked for a break up. The other flight would be aircraft Y. I confirmed that the aircraft were vertically separated; [I] radar identified aircraft Y and canceled marsa between the two aircraft. Aircraft X was assigned slow as [practical] airspeed and at FL250. Aircraft Y was assigned best forward airspeed and at FL240. My intention was to take aircraft Y down but misspoke and gave aircraft X clearance to a lower altitude which descended him through aircraft Y altitudes. Aircraft X was turned to a heading of 320 until standard separation was established then given a fix back on course.I would not cancel marsa so soon in the future.
Original NASA ASRS Text
Title: ZID Controller reports of flight break up and issuing descent clearance to wrong aircraft and then having a loss of separation. FLM reports that he was distracted from the operation by doing other FLM duties and did not hear the Controller was having a flight break up.
Narrative: Aircraft X was a flight of 2 [light transport; low wing; 2 turbojet aircraft] and asked for a break up. The other flight would be Aircraft Y. I confirmed that the aircraft were vertically separated; [I] radar identified Aircraft Y and canceled MARSA between the two aircraft. Aircraft X was assigned slow as [practical] airspeed and at FL250. Aircraft Y was assigned best forward airspeed and at FL240. My intention was to take Aircraft Y down but misspoke and gave Aircraft X clearance to a lower altitude which descended him through Aircraft Y altitudes. Aircraft X was turned to a heading of 320 until standard separation was established then given a fix back on course.I would not cancel MARSA so soon in the future.
Data retrieved from NASA's ASRS site 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.