<< >> NASA ASRS Report 1607250, January 2019

Air carrier dispatcher reported noticing two company flights were in the air simultaneously with the same flight number.

Attributes
ACN	1607250
Time
Date	201901
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Dispatcher
Qualification	Dispatch Dispatcher
Events
Anomaly	Deviation - Procedural Published Material / Policy

Narrative:

[I became aware that] both of these flights were in the same airspace with the same call sign. The other dispatcher notified ATC and [changed one of the flights] to mitigate the problem. Both flights had been planned already when [this dispatch shift] got in.we failed to [change the flight number of] one of the flights before both flights got in the air.we should not be assigning two flights out of two different stations the same call sign because there is no notification if it becomes an issue.

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Original NASA ASRS Text

Title: Air Carrier Dispatcher reported noticing two company flights were in the air simultaneously with the same flight number.

Narrative: [I became aware that] both of these flights were in the same airspace with the same call sign. The other Dispatcher notified ATC and [changed one of the flights] to mitigate the problem. Both flights had been planned already when [this dispatch shift] got in.We failed to [change the flight number of] one of the flights before both flights got in the air.We should not be assigning two flights out of two different stations the same call sign because there is no notification if it becomes an issue.

Data retrieved from NASA's ASRS site 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.