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Clt TRACON controller describes arrival situation to parallel runways using what he thought was 15 degree course divergence. Controller had a loss of separation.
| Attributes | |
| ACN | 1183146 |
| Time | |
| Date | 201406 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | CLT.TRACON |
| State Reference | NC |
| Aircraft 1 | |
| Make Model Name | Medium Large Transport |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Light Transport Low Wing 2 Turbojet Eng |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 6.5 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types |
Narrative:
Aircraft X was cleared for the visual approach; already established on runway 18R localizer descending out of 4;000 ft showing about 170 knots. Aircraft Y was about 7 miles northwest of aircraft X at the same altitude. I told aircraft Y to fly heading 150 until established on the runway 18C localizer cleared visual approach runway 18C. Aircraft Y was not issued a speed since he was the only aircraft going to 18C (showing about 230 knots). I was using the rule 15 degree course divergence (actually had 30 degrees) with aircraft X on a 180 and aircraft Y on a 150 until established on the 18C localizer. They both were on different runways with 18R and 18C. Aircraft Y got within about 2 miles before he passed aircraft X and established on runway 18C. I was counseled by a supervisor that this was a deal because I needed 45 degrees divergence. I do not understand this. I do this all the time and I am unsure what I did wrong. I am not sure who to talk to about this so I am filling out this report. Also many supervisors are saying I need to apply wake turbulence separation which I also believe to be untrue since I was not near the landing threshold. Basically I was using 15 degrees divergence until both were established on their localizers and cleared visual approach and I was told this is wrong. We need to all be on the same page with this. I train many people and want to make sure I am teaching them right.
Original NASA ASRS Text
Title: CLT TRACON Controller describes arrival situation to parallel runways using what he thought was 15 degree course divergence. Controller had a loss of separation.
Narrative: Aircraft X was cleared for the visual approach; already established on Runway 18R localizer descending out of 4;000 FT showing about 170 knots. Aircraft Y was about 7 miles northwest of Aircraft X at the same altitude. I told Aircraft Y to fly heading 150 until established on the Runway 18C localizer cleared visual approach Runway 18C. Aircraft Y was not issued a speed since he was the only aircraft going to 18C (showing about 230 knots). I was using the rule 15 degree course divergence (actually had 30 degrees) with Aircraft X on a 180 and Aircraft Y on a 150 until established on the 18C localizer. They both were on different runways with 18R and 18C. Aircraft Y got within about 2 miles before he passed Aircraft X and established on runway 18C. I was counseled by a Supervisor that this was a deal because I needed 45 degrees divergence. I do not understand this. I do this all the time and I am unsure what I did wrong. I am not sure who to talk to about this so I am filling out this report. Also many supervisors are saying I need to apply wake turbulence separation which I also believe to be untrue since I was not near the landing threshold. Basically I was using 15 degrees divergence until both were established on their localizers and cleared visual approach and I was told this is wrong. We need to all be on the same page with this. I train many people and want to make sure I am teaching them right.
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.