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An air carrier B747 flight crew finds that their flight plan was dropped by the ARTCC computer, while they were en route, because of conflicting flight numbers. The flight crew notified the company and ARTCC about this problem.
| Attributes | |
| ACN | 378026 |
| Time | |
| Date | 199708 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : cdb |
| State Reference | AK |
| Altitude | msl bound lower : 29000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : other oceanic enroute : pacific enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : instrument pilot : flight engineer |
| Experience | flight time last 90 days : 90 flight time total : 22000 flight time type : 1200 |
| ASRS Report | 378026 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | inflight encounter : weather non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa other other : unspecified |
| Resolutory Action | flight crew : exited adverse environment none taken : detected after the fact other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Because of conflicting flight numbers filed with japan oceanic and ZOA, we were dropped out of the system when entering oak airspace and we encountered WX at the same time requiring us to make a cleared WX deviation. We used company procedure (calls on 121.5 vhs, altitude change, TCASII) to avoid possible traffic. No known conflicts. This event was followed up with oak oceanic and company dispatch to help resolve future problems.
Original NASA ASRS Text
Title: AN ACR B747 FLC FINDS THAT THEIR FLT PLAN WAS DROPPED BY THE ARTCC COMPUTER, WHILE THEY WERE ENRTE, BECAUSE OF CONFLICTING FLT NUMBERS. THE FLC NOTIFIED THE COMPANY AND ARTCC ABOUT THIS PROB.
Narrative: BECAUSE OF CONFLICTING FLT NUMBERS FILED WITH JAPAN OCEANIC AND ZOA, WE WERE DROPPED OUT OF THE SYS WHEN ENTERING OAK AIRSPACE AND WE ENCOUNTERED WX AT THE SAME TIME REQUIRING US TO MAKE A CLRED WX DEV. WE USED COMPANY PROC (CALLS ON 121.5 VHS, ALT CHANGE, TCASII) TO AVOID POSSIBLE TFC. NO KNOWN CONFLICTS. THIS EVENT WAS FOLLOWED UP WITH OAK OCEANIC AND COMPANY DISPATCH TO HELP RESOLVE FUTURE PROBS.
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.