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ZID controller experienced loss of separation at FL340 when climbing aircraft slowed to unexpected rate creating the conflict; weather chop listed as possible factor.
| Attributes | |
| ACN | 830954 |
| Time | |
| Date | 200904 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZID.ARTCC |
| State Reference | IN |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | MD-88 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B717 (Formerly MD-95) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Developmental Flight Crew Instrument |
| Experience | Flight Crew Total 234 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict |
| Miss Distance | Horizontal 22200 Vertical 8001 |
Narrative:
I climbed aircraft X thinking aircraft Y was out of FL340. I asked aircraft Y to expedite climb. Aircraft Y said he was doing 300 FPM. I issued 30 degree turns to aircraft X and aircraft Y. Aircraft Y had been climbing well (1;000 FPM). He then didn't climb well out of FL340. It was very choppy and that may have been a factor.
Original NASA ASRS Text
Title: ZID Controller experienced loss of separation at FL340 when climbing aircraft slowed to unexpected rate creating the conflict; weather chop listed as possible factor.
Narrative: I climbed Aircraft X thinking Aircraft Y was out of FL340. I asked Aircraft Y to expedite climb. Aircraft Y said he was doing 300 FPM. I issued 30 degree turns to Aircraft X and Aircraft Y. Aircraft Y had been climbing well (1;000 FPM). He then didn't climb well out of FL340. It was very choppy and that may have been a factor.
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.