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Apc tower controller reported an aircraft landing on the wrong runway; causing another aircraft to go-around.
| Attributes | |
| ACN | 1582943 |
| Time | |
| Date | 201810 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | APC.Airport |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | DA40 Diamond Star |
| Flight Phase | Landing |
| Route In Use | None |
| Flight Plan | VFR |
| Aircraft 2 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Flight Phase | Final Approach |
| Route In Use | None |
| Flight Plan | VFR |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Developmental |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Landing Without Clearance Ground Incursion Runway |
Narrative:
I was working local. Aircraft Y and aircraft X were both on frequency and sequenced to parallel runways; aircraft Y on 18R and aircraft X on 18L. Both were issued traffic just prior to them turning base leg. I knew aircraft Y pilot was good; so I cleared them right away; aircraft X acted hesitant; so I waited to clear him; so I could check and see if he was lined up for the right runway.aircraft X appeared to be lined up for 18L when he turned final and; just before I was going to clear him; aircraft Z who was unfamiliar with the area called up. I thought I had time to acknowledge aircraft Z because the parallel runway thresholds are offset. By the time I got back to aircraft X he had landed on 18R without clearance and aircraft Y had to go around.when aircraft X showed hesitation I should have said the name of the runway aircraft Y was landing on instead of calling it 'the parallel runway.' I also should have waited until after I cleared aircraft X to acknowledge aircraft Z; even though I was sure aircraft X was lined up for the right runway.
Original NASA ASRS Text
Title: APC Tower Controller reported an aircraft landing on the wrong runway; causing another aircraft to go-around.
Narrative: I was working local. Aircraft Y and Aircraft X were both on frequency and sequenced to parallel runways; Aircraft Y on 18R and Aircraft X on 18L. Both were issued traffic just prior to them turning base leg. I knew Aircraft Y pilot was good; so I cleared them right away; Aircraft X acted hesitant; so I waited to clear him; so I could check and see if he was lined up for the right runway.Aircraft X appeared to be lined up for 18L when he turned final and; just before I was going to clear him; Aircraft Z who was unfamiliar with the area called up. I thought I had time to acknowledge Aircraft Z because the parallel runway thresholds are offset. By the time I got back to Aircraft X he had landed on 18R without clearance and Aircraft Y had to go around.When Aircraft X showed hesitation I should have said the name of the runway Aircraft Y was landing on instead of calling it 'the parallel runway.' I also should have waited until after I cleared Aircraft X to acknowledge Aircraft Z; even though I was sure Aircraft X was lined up for the right runway.
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.