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Ffz tower controller reported a near mid air collision that happened while working local. An aircraft executed an unexpected go-around with another aircraft transitioning the airspace and got too close at the departure end of the runway.
| Attributes | |
| ACN | 1326460 |
| Time | |
| Date | 201601 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | FFZ.Tower |
| State Reference | AZ |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Small Aircraft |
| Flight Phase | Other go a round |
| Route In Use | None |
| Flight Plan | VFR |
| Aircraft 2 | |
| Make Model Name | Helicopter |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Route In Use | Other GECKO1 |
| Flight Plan | VFR |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 1 |
| Events | |
| Anomaly | ATC Issue All Types Conflict NMAC Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy |
Narrative:
I had a taxi back on runway 04L and told him to expedite to the end to exit the runway as aircraft X was on final behind him. Aircraft Y was transitioning to the base of the tower via the GECKO1 transition. Aircraft X for whatever reason decided to go-around even though spacing was going to exist. He informed me of this decision short final. After completing a scan I noticed that aircraft Y was 0.5 NM northwest of the field about to cross. Aircraft X was passing the numbers at this time and so I issued a traffic alert to both aircraft. Aircraft Y took evasive action avoiding collision and I would estimate the aircraft passed within 100 feet of each other. Neither pilot informed me they were going to file a near midair collision.
Original NASA ASRS Text
Title: FFZ Tower Controller reported a Near Mid Air Collision that happened while working local. An aircraft executed an unexpected go-around with another aircraft transitioning the airspace and got too close at the departure end of the runway.
Narrative: I had a taxi back on Runway 04L and told him to expedite to the end to exit the runway as Aircraft X was on final behind him. Aircraft Y was transitioning to the base of the tower via the GECKO1 transition. Aircraft X for whatever reason decided to go-around even though spacing was going to exist. He informed me of this decision short final. After completing a scan I noticed that Aircraft Y was 0.5 NM northwest of the field about to cross. Aircraft X was passing the numbers at this time and so I issued a traffic alert to both aircraft. Aircraft Y took evasive action avoiding collision and I would estimate the aircraft passed within 100 feet of each other. Neither pilot informed me they were going to file a NMAC.
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.