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TRACON controller described a loss of separation event due in part to vectoring traffic for an instrument approach on a tight downwind.
| Attributes | |
| ACN | 1090794 |
| Time | |
| Date | 201305 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Final Approach |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Final Approach |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach Departure |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy |
Narrative:
Both aircraft were on vectors for VOR runway 23 practice approaches. Aircraft X was turned base (320 heading) and descended from 3;100 ft to 2;100 ft. Aircraft Y was 4 miles in-trail of aircraft X at 3;100 ft; on the downwind heading (heading 060.) when aircraft Y was turned onto final (final course heading 240) he was still in the descent to 2;100 ft. Aircraft Y was still on the downwind heading at the same time as aircraft X was turned final. The separation was lost as the two aircraft passed laterally (final and downwind) due to a tight downwind to final. When I realized that aircraft Y was going to be too close to aircraft X for IFR separation; aircraft Y was turned 'out' to a heading of 070. There were multiple other approaches and IFR student pilot training going on throughout the sector with multiple other aircraft on vectors and/or approaches.
Original NASA ASRS Text
Title: TRACON Controller described a loss of separation event due in part to vectoring traffic for an instrument approach on a tight downwind.
Narrative: Both aircraft were on vectors for VOR Runway 23 practice approaches. Aircraft X was turned base (320 heading) and descended from 3;100 FT to 2;100 FT. Aircraft Y was 4 miles in-trail of Aircraft X at 3;100 FT; on the downwind heading (heading 060.) When Aircraft Y was turned onto final (final course heading 240) he was still in the descent to 2;100 FT. Aircraft Y was still on the downwind heading at the same time as Aircraft X was turned final. The separation was lost as the two aircraft passed laterally (final and downwind) due to a tight downwind to final. When I realized that Aircraft Y was going to be too close to Aircraft X for IFR separation; Aircraft Y was turned 'out' to a heading of 070. There were multiple other approaches and IFR student pilot training going on throughout the sector with multiple other aircraft on vectors and/or approaches.
Data retrieved from NASA's ASRS site as of July 2013 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.