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ARTCC oceanic controller does not thoroughly scan flight strip bay and odaps display for conflicting traffic and climbs MD11 into military KC10's altitude on diverging route.
| Attributes | |
| ACN | 404791 |
| Time | |
| Date | 199806 |
| Day | Sat |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : nud |
| State Reference | AK |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa tower : dal |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : other oceanic enroute : pacific |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : non radar |
| Qualification | controller : non radar controller : radar |
| Experience | controller non radar : 3 controller radar : 8 |
| ASRS Report | 404791 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Miss Distance | horizontal : 99999 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 requested climb clearance. I conducted a traffic search in the 180 degree strip bay and saw no conflict. Subsequently, aircraft #1 inquired about traffic at same altitude in vicinity. After aircraft #2 reported over 43N/170E, I realized that the aircraft were in close proximity of each other, but separation was already lost, and the aircraft were diverging.
Original NASA ASRS Text
Title: ARTCC OCEANIC CTLR DOES NOT THOROUGHLY SCAN FLT STRIP BAY AND ODAPS DISPLAY FOR CONFLICTING TFC AND CLBS MD11 INTO MIL KC10'S ALT ON DIVERGING RTE.
Narrative: ACFT #1 REQUESTED CLB CLRNC. I CONDUCTED A TFC SEARCH IN THE 180 DEG STRIP BAY AND SAW NO CONFLICT. SUBSEQUENTLY, ACFT #1 INQUIRED ABOUT TFC AT SAME ALT IN VICINITY. AFTER ACFT #2 RPTED OVER 43N/170E, I REALIZED THAT THE ACFT WERE IN CLOSE PROX OF EACH OTHER, BUT SEPARATION WAS ALREADY LOST, AND THE ACFT WERE DIVERGING.
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.