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ZOB d-side controller described a loss of separation event when r-side controller failed to initiated positive control involving a departure overtake event; reporter indicating vertical separation; not a lateral vector; would have been the only positive action available to the radar controller.
| Attributes | |
| ACN | 864766 |
| Time | |
| Date | 200912 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZOB.ARTCC |
| State Reference | OH |
| Aircraft 1 | |
| Make Model Name | Light Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Light Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | Conflict Airborne Conflict |
Narrative:
Aircraft X and aircraft Y departed dtw approach airspace and during the climb there was an overtake developing. The uret showed the two aircraft were going to be in conflict and I told the r-position after noticing that there was a 70 knot overtake. The r-side had already noticed the overtake and thought that as aircraft X turned towards their destination that would separate the two. This wasn't the case and the r-side then stopped aircraft Y at FL290 but aircraft X was not yet out of FL300 and a proximity event occurred. Recommendation; use positive vertical separation until lateral separation is obtained.
Original NASA ASRS Text
Title: ZOB D-Side Controller described a loss of separation event when R-Side Controller failed to initiated positive control involving a departure overtake event; reporter indicating vertical separation; not a lateral vector; would have been the only positive action available to the RADAR Controller.
Narrative: Aircraft X and Aircraft Y departed DTW Approach airspace and during the climb there was an overtake developing. The URET showed the two aircraft were going to be in conflict and I told the R-position after noticing that there was a 70 knot overtake. The R-side had already noticed the overtake and thought that as Aircraft X turned towards their destination that would separate the two. This wasn't the case and the R-side then stopped Aircraft Y at FL290 but Aircraft X was not yet out of FL300 and a Proximity Event Occurred. Recommendation; use positive vertical separation until lateral separation is obtained.
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.