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Potential conflict on a same runway assignment. ATCT local controller fails to note the position of the number two PA31 that was cleared into position after PA31 number one was cleared for takeoff on runway 24R at anc, ak.
| Attributes | |
| ACN | 548150 |
| Time | |
| Date | 200205 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : anc.airport |
| State Reference | AK |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air taxi |
| Make Model Name | PA-31 Navajo Chieftan/Mojave/Navajo T1020 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | VFR |
| Aircraft 2 | |
| Controlling Facilities | tower : anc.tower |
| Operator | common carrier : air taxi |
| Make Model Name | PA-31 Navajo Chieftan/Mojave/Navajo T1020 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | ground : taxi |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Experience | controller time certified in position1 : 3.75 |
| ASRS Report | 548150 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : single pilot |
| Events | |
| Anomaly | incursion : runway non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : rejected takeoff other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | vertical : 0 |
| Supplementary | |
| Problem Areas | ATC Human Performance ATC Facility Flight Crew Human Performance Airport FAA Environmental Factor |
| Primary Problem | ATC Facility |
| Air Traffic Incident | Operational Error |
Narrative:
I cleared #1 PA31 for takeoff runway 24R. I taxied #2 PA31 into position and hold runway 24R. #1 PA31 advised there was an aircraft on his runway. I observed #2 PA31 in the vicinity of runway 24R at intersection east. I did not observe him on the runway. The #2 PA31 did not state he was at taxiway east. It was noted on the strip. Runway sjs 24R approach end not in sight from the tower and we had a new asde map. Apparently the #2 PA31 accessed runway 24R at echo as the #1 PA31 was departure. The situation may have been different had I noticed the strip marking indicating runway 24R at east or had the aircraft verbalized to me that he was at east or if I had been able to see the approach end of runway 24R.
Original NASA ASRS Text
Title: POTENTIAL CONFLICT ON A SAME RWY ASSIGNMENT. ATCT LCL CTLR FAILS TO NOTE THE POSITION OF THE NUMBER TWO PA31 THAT WAS CLEARED INTO POSITION AFTER PA31 NUMBER ONE WAS CLEARED FOR TKOF ON RWY 24R AT ANC, AK.
Narrative: I CLRED #1 PA31 FOR TAKEOFF RWY 24R. I TAXIED #2 PA31 INTO POSITION AND HOLD RWY 24R. #1 PA31 ADVISED THERE WAS AN ACFT ON HIS RWY. I OBSERVED #2 PA31 IN THE VICINITY OF RWY 24R AT INTERSECTION E. I DID NOT OBSERVE HIM ON THE RWY. THE #2 PA31 DID NOT STATE HE WAS AT TXWY E. IT WAS NOTED ON THE STRIP. RWY SJS 24R APCH END NOT IN SIGHT FROM THE TWR AND WE HAD A NEW ASDE MAP. APPARENTLY THE #2 PA31 ACCESSED RWY 24R AT ECHO AS THE #1 PA31 WAS DEP. THE SIT MAY HAVE BEEN DIFFERENT HAD I NOTICED THE STRIP MARKING INDICATING RWY 24R AT E OR HAD THE ACFT VERBALIZED TO ME THAT HE WAS AT E OR IF I HAD BEEN ABLE TO SEE THE APCH END OF RWY 24R.
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.