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A dispatcher was notified of duplicate flight numbers by his company software program. To mitigate the problem; he added a letter suffix to the associated flight number; making it a radio number. He was not aware; that the dispatcher responsible for the other flight had also received notification and added the identical letter suffix to his flight number; thus counteracting the mitigation.
| Attributes | |
| ACN | 1084047 |
| Time | |
| Date | 201304 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Dispatcher |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy |
Narrative:
The dispatch [program] alerted that a radio number was required to be added to [one of] my flights to avoid a conflict with the late arriving inbound flight of the same number. I complied with this by adding a suffix X to the call sign. What I was not aware of was that my counterpart on the sector next to me had also added a radio number suffix X to his flight with the same number based on the alerting from dispatch [program]. I was not advised in any messaging alert that this radio number was already in use. We ended up having two flights with the same radio number active at the same time on [the same] ATC frequencies.
Original NASA ASRS Text
Title: A Dispatcher was notified of duplicate flight numbers by his company software program. To mitigate the problem; he added a letter suffix to the associated flight number; making it a radio number. He was not aware; that the Dispatcher responsible for the other flight had also received notification and added the identical letter suffix to his flight number; thus counteracting the mitigation.
Narrative: The Dispatch [program] alerted that a radio number was required to be added to [one of] my flights to avoid a conflict with the late arriving inbound flight of the same number. I complied with this by adding a suffix X to the call sign. What I was not aware of was that my counterpart on the sector next to me had also added a radio number suffix X to his flight with the same number based on the alerting from dispatch [program]. I was not advised in any messaging alert that this radio number was already in use. We ended up having two flights with the same radio number active at the same time on [the same] ATC frequencies.
Data retrieved from NASA's ASRS site as of July 2013 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.