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Tower controller described a ground conflict event when misjudging a vehicle runway crossing and an aircraft on short final.
| Attributes | |
| ACN | 964107 |
| Time | |
| Date | 201108 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Flight Phase | Landing |
| Route In Use | None |
| Flight Plan | VFR |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | Conflict Ground Conflict Critical |
Narrative:
A C172 was performing touch and go's on the runway. Ground coordinated to cross the runway at kilo 3 intersection. I scanned the runway and did not see any aircraft on final or rolling out. I looked at the d-brite and saw the C172 on 1/4 mile final. I visually saw what I believed to be the C172 out the window in the same position. I gave ground permission to cross the runway. I cleared the C172 for a touch and go. The aircraft replied he was waiting for a fuel truck. The sun was setting. There was significant glare which caused me to use both sunglasses and tower shades. In the future I will not use the d-bright for an aircraft that is in such close proximity to the airport; due to the lag in the radar; and to not try to beat the aircraft but rather to wait for him to pass.
Original NASA ASRS Text
Title: Tower Controller described a ground conflict event when misjudging a vehicle runway crossing and an aircraft on short final.
Narrative: A C172 was performing touch and go's on the runway. Ground coordinated to cross the runway at Kilo 3 Intersection. I scanned the runway and did not see any aircraft on final or rolling out. I looked at the D-Brite and saw the C172 on 1/4 mile final. I visually saw what I believed to be the C172 out the window in the same position. I gave Ground permission to cross the runway. I cleared the C172 for a touch and go. The aircraft replied he was waiting for a fuel truck. The sun was setting. There was significant glare which caused me to use both sunglasses and tower shades. In the future I will not use the D-Bright for an aircraft that is in such close proximity to the airport; due to the lag in the RADAR; and to not try to beat the aircraft but rather to wait for him to pass.
Data retrieved from NASA's ASRS site as of April 2012 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.