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A local controller reported an inbound aircraft still on approach control frequency descended through the altitude of a VFR departure.
| Attributes | |
| ACN | 1483005 |
| Time | |
| Date | 201709 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ADS.Airport |
| State Reference | TX |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Small Aircraft Low Wing 1 Eng Fixed Gear |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Climb |
| Route In Use | VFR Route |
| Flight Plan | VFR |
| Aircraft 2 | |
| Make Model Name | Light Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Final Approach |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 4.5 |
| Events | |
| Anomaly | ATC Issue All Types Conflict NMAC |
Narrative:
Aircraft X was on my frequency departing to the north squawking 1200. I restricted aircraft X to maintain at/or below 2;000 feet for inbound traffic from the northeast; a VFR [aircraft] worked by approach at 2;500 feet. I noticed there could be potential additional traffic from the northeast traveling southwest bound to intercept the final; aircraft Y at 2;500 feet still talking with approach. I issued traffic to aircraft X regarding aircraft Y; then I noticed aircraft Y descending from 2;500 feet to 2;300 feet then to 2;200 feet. I told aircraft X about the traffic and immediately suggested a right turn to avoid the traffic. Then I saw aircraft Y changing heading from southwest to southeast right into aircraft X. I tried to reach for aircraft Y; but he wasn't on my frequency. At that point the 2 aircraft were about 1 1/2 miles apart and I issued a traffic alert to aircraft X and aircraft X reported aircraft Y in sight. I saw the targets merging on radar at the same altitude of 2;000 feet.the recommendation would be to restrict descend on an arriving aircraft until passing any VFR aircraft below that could become a conflict.
Original NASA ASRS Text
Title: A Local Controller reported an inbound aircraft still on Approach Control frequency descended through the altitude of a VFR departure.
Narrative: Aircraft X was on my frequency departing to the north squawking 1200. I restricted Aircraft X to maintain at/or below 2;000 feet for inbound traffic from the northeast; a VFR [aircraft] worked by Approach at 2;500 feet. I noticed there could be potential additional traffic from the northeast traveling southwest bound to intercept the final; Aircraft Y at 2;500 feet still talking with Approach. I issued traffic to Aircraft X regarding Aircraft Y; then I noticed Aircraft Y descending from 2;500 feet to 2;300 feet then to 2;200 feet. I told Aircraft X about the traffic and immediately suggested a right turn to avoid the traffic. Then I saw Aircraft Y changing heading from southwest to southeast right into Aircraft X. I tried to reach for Aircraft Y; but he wasn't on my frequency. At that point the 2 aircraft were about 1 1/2 miles apart and I issued a traffic alert to Aircraft X and Aircraft X reported Aircraft Y in sight. I saw the targets merging on radar at the same altitude of 2;000 feet.The recommendation would be to restrict descend on an arriving aircraft until passing any VFR aircraft below that could become a conflict.
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.