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Prc local controller observed an aircraft that had been established on final maneuvered on its own to a base leg position on a conflicting course with downwind traffic.
| Attributes | |
| ACN | 1420737 |
| Time | |
| Date | 201701 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | PRC.Tower |
| State Reference | AZ |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Small Transport |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Approach |
| Route In Use | Visual Approach |
| Flight Plan | None |
| Aircraft 2 | |
| Make Model Name | Small Aircraft High Wing 1 Eng Fixed Gear |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Approach |
| Route In Use | Visual Approach |
| Flight Plan | None |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 6 |
| Events | |
| Anomaly | ATC Issue All Types Conflict NMAC |
| Miss Distance | Vertical 200 |
Narrative:
I was working the local 1 position; training in progress. The traffic pattern was getting unwieldy; so I took over and started to clean up the sequence. Aircraft X was number 1 on 3 mile final runway 3R. Three aircraft were on the downwind; extended to follow aircraft X. I saw what I thought was aircraft Y cut out aircraft X; but realized it was aircraft X appearing to be on right base runway 3R; inside the downwind. I re-cleared aircraft X; and that was when aircraft Z advised near midair collision with aircraft X.the pilot of aircraft X should have advised me what he was doing; especially if it was safety related (birds; for instance). I could have at the very least called traffic.
Original NASA ASRS Text
Title: PRC Local Controller observed an aircraft that had been established on final maneuvered on its own to a base leg position on a conflicting course with downwind traffic.
Narrative: I was working the Local 1 position; training in progress. The traffic pattern was getting unwieldy; so I took over and started to clean up the sequence. Aircraft X was number 1 on 3 mile final Runway 3R. Three aircraft were on the downwind; extended to follow Aircraft X. I saw what I thought was Aircraft Y cut out Aircraft X; but realized it was Aircraft X appearing to be on right base Runway 3R; inside the downwind. I re-cleared Aircraft X; and that was when Aircraft Z advised NMAC with Aircraft X.The pilot of Aircraft X should have advised me what he was doing; especially if it was safety related (birds; for instance). I could have at the very least called traffic.
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.