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Small aircraft Y takeoff on occupied runway had less than standard separation from small aircraft X. System error. Pilot deviation.
| Attributes | |
| ACN | 178515 |
| Time | |
| Date | 199105 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : anc |
| State Reference | AK |
| Altitude | agl bound lower : 0 agl bound upper : 500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Flight Phase | ground : holding |
| Aircraft 2 | |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Flight Phase | climbout : takeoff ground : holding |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| ASRS Report | 178515 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Events | |
| Anomaly | conflict : ground critical non adherence : published procedure non adherence : required legal separation non adherence : far |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Error |
Narrative:
I taxied 3 aircraft onto runway 14 (position and hold). I mistakenly cleared the middle small aircraft Y for takeoff thinking it was the #1 small aircraft X. Attempts to cancel the takeoff clearance were not acknowledged. Small aircraft Y, #2, departed passing approximately 500' above small aircraft X still holding on the runway. Putting aircraft of the same type, west/O distinguishing markings on the runway at the same time greatly increases the odds of this occurrence and is not something I will do again.
Original NASA ASRS Text
Title: SMA Y TKOF ON OCCUPIED RWY HAD LESS THAN STANDARD SEPARATION FROM SMA X. SYSTEM ERROR. PLTDEV.
Narrative: I TAXIED 3 ACFT ONTO RWY 14 (POS AND HOLD). I MISTAKENLY CLRED THE MIDDLE SMA Y FOR TKOF THINKING IT WAS THE #1 SMA X. ATTEMPTS TO CANCEL THE TKOF CLRNC WERE NOT ACKNOWLEDGED. SMA Y, #2, DEPARTED PASSING APPROX 500' ABOVE SMA X STILL HOLDING ON THE RWY. PUTTING ACFT OF THE SAME TYPE, W/O DISTINGUISHING MARKINGS ON THE RWY AT THE SAME TIME GREATLY INCREASES THE ODDS OF THIS OCCURRENCE AND IS NOT SOMETHING I WILL DO AGAIN.
Data retrieved from NASA's ASRS site as of July 2007 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.