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Tower controller reported an near midair collision due to local controller's sequence of two aircraft.
| Attributes | |
| ACN | 1594678 |
| Time | |
| Date | 201811 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Tower |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | HS 125 Series |
| Flight Phase | Descent |
| Route In Use | Other Instrument Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Approach Final Approach |
| Route In Use | Visual Approach |
| Flight Plan | VFR |
| Person 1 | |
| Function | Other / Unknown |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 3 |
| Events | |
| Anomaly | ATC Issue All Types Conflict NMAC |
Narrative:
Aircraft X was on a VOR/DME to runway 34. We then had aircraft Y; inbound from the north. LC1 had aircraft Y cross over the field to enter the downwind for runway 34; to avoid the wake turbulence from aircraft X's circle. Once aircraft Y had established himself in the downwind at 020 ft; aircraft X was on a 1 mile final; at approximately 027 ft; and claimed to still have the runway in sight. At this point; I told the local controller that he was not going to be able to land; and to climb him to 030 [feet]; in order to clear aircraft Y. The LC1 controller felt it was more important to widen out aircraft Y's downwind; to avoid aircraft X. I instructed him again to climb aircraft X; as he was still descending. The LC1 controller climbed him to 030; while I worked on coordinating a heading for aircraft X. They both landed safely; after aircraft X was vectored out for the visual approach; and aircraft Y landed immediately after the go around. Aircraft Y pilot called later and informed us that aircraft X came within 200 ft of him.have a cutoff point. Had we climbed aircraft X at a 1 mile final when he was too high; he would have been no factor for aircraft Y.
Original NASA ASRS Text
Title: Tower Controller reported an NMAC due to Local Controller's sequence of two aircraft.
Narrative: Aircraft X was on a VOR/DME to Runway 34. We then had Aircraft Y; inbound from the north. LC1 had Aircraft Y cross over the field to enter the downwind for Runway 34; to avoid the wake turbulence from Aircraft X's circle. Once Aircraft Y had established himself in the downwind at 020 ft; Aircraft X was on a 1 mile final; at approximately 027 ft; and claimed to still have the runway in sight. At this point; I told the Local Controller that he was not going to be able to land; and to climb him to 030 [feet]; in order to clear Aircraft Y. The LC1 controller felt it was more important to widen out Aircraft Y's downwind; to avoid Aircraft X. I instructed him again to climb Aircraft X; as he was still descending. The LC1 controller climbed him to 030; while I worked on coordinating a heading for Aircraft X. They both landed safely; after Aircraft X was vectored out for the Visual Approach; and Aircraft Y landed immediately after the go around. Aircraft Y pilot called later and informed us that Aircraft X came within 200 ft of him.Have a cutoff point. Had we climbed Aircraft X at a 1 mile final when he was too high; he would have been no factor for Aircraft Y.
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.