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An A319 departed off stl 18 NM in trail of a regional jet along the same route; in a busy sector with weather deviations in progress. The rj was cleared to FL290 but did not climb and substantially slows without communicating his intentions. Separation was lost when the airbus arrived at FL230 with a 150 knot overtake before the rj reached FL240 in the climb. Training was also in progress.
| Attributes | |
| ACN | 952962 |
| Time | |
| Date | 201106 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZKC.ARTCC |
| State Reference | KS |
| Aircraft 1 | |
| Make Model Name | A319 |
| Flight Phase | Initial Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Departure |
| Qualification | Air Traffic Control Fully Certified |
| Person 2 | |
| Function | Enroute |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 14 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy Inflight Event / Encounter Weather / Turbulence |
Narrative:
Aircraft X departed off stl and I cleared to FL230. Aircraft Y then departed stl 18 miles behind and was given same clearance. Aircraft X asked for weather deviation out of FL200 and I instructed him to contact high sector with request. High sector advised me he would be deviating left. Aircraft Y then asked for deviation and I asked him if he could go right and he said he could. I issued 20 degree right deviation and direct vhp when able. I then handed off to high sector. Aircraft X was issued higher from sector 12 but didn't climb for over 2 min. Aircraft Y turned back on course and was never given higher from sector 12 so he leveled off as well. There were 12 miles between aircraft when they leveled off but aircraft Y had 150kt overtake and separation was lost. I don't feel like low sectors should have been combined with 17 aircraft and deviations.
Original NASA ASRS Text
Title: An A319 departed off STL 18 NM in trail of a regional jet along the same route; in a busy sector with weather deviations in progress. The RJ was cleared to FL290 but did not climb and substantially slows without communicating his intentions. Separation was lost when the Airbus arrived at FL230 with a 150 knot overtake before the RJ reached FL240 in the climb. Training was also in progress.
Narrative: Aircraft X departed off STL and I cleared to FL230. Aircraft Y then departed STL 18 miles behind and was given same clearance. Aircraft X asked for weather deviation out of FL200 and I instructed him to contact high sector with request. High sector advised me he would be deviating left. Aircraft Y then asked for deviation and I asked him if he could go right and he said he could. I issued 20 degree right deviation and direct VHP when able. I then handed off to high sector. Aircraft X was issued higher from sector 12 but didn't climb for over 2 min. Aircraft Y turned back on course and was never given higher from sector 12 so he leveled off as well. There were 12 miles between aircraft when they leveled off but Aircraft Y had 150kt overtake and separation was lost. I don't feel like low sectors should have been combined with 17 aircraft and deviations.
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.