Narrative:

As I was building the release for this flight; I was getting an error that the drift-down alternates could not be calculated because of an error. [Name] told me to file it and make sure that the drift-down information was on the release. I filed it; checked the release; and the information was missing. After I corrected this issue; I called [the associated ARTCC] to pull the flight strip; sent the correct [flight plan] and sent an ACARS message to the crew and then called ops to pass the info to the crew to print the new [flight plan]. While the flight was enroute; I got a message from the crew that the route given to them by ATC was not matching what was on the release. I sent him the correct flight summary; the drift-down information and the weather for his escape airport. I then did a pen and ink for the new [flight plan]. The captain said he was not notified by the gate agent and did not receive the ACARS.there was a breakdown of communication. The gate agent did not notify the crew to print the new [flight plan]; and the crew did not receive the ACARS message. Next time I [will] directly call the captain and follow up to ensure that they have the correct [flight plan].

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Original NASA ASRS Text

Title: An air carrier dispatcher reported a flight departed with out of date information because of a breakdown in communications.

Narrative: As I was building the release for this flight; I was getting an error that the drift-down alternates could not be calculated because of an error. [Name] told me to file it and make sure that the drift-down information was on the release. I filed it; checked the release; and the information was missing. After I corrected this issue; I called [the associated ARTCC] to pull the flight strip; sent the correct [flight plan] and sent an ACARS message to the crew and then called Ops to pass the info to the crew to print the new [flight plan]. While the flight was enroute; I got a message from the crew that the route given to them by ATC was not matching what was on the release. I sent him the correct flight summary; the drift-down information and the weather for his escape airport. I then did a pen and ink for the new [flight plan]. The Captain said he was not notified by the gate agent and did not receive the ACARS.There was a breakdown of communication. The gate agent did not notify the crew to print the new [flight plan]; and the crew did not receive the ACARS message. Next time I [will] directly call the Captain and follow up to ensure that they have the correct [flight plan].

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.