AEROSPACE TECHNOLOGIES

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Clearing The Air On A “CLEARED TO” (UM79) CPDLC Message

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Clearing The Air On A “CLEARED TO” (UM79) CPDLC Message

Quick Topic Video

By Ryan Milmoe

January 24, 2021

There have been reports that some operators using CPDLC (Controller Pilot Data Link Communication) have been misinterpreting a certain uplink message sent by ATC to the aircraft. The uplink message in question here is the UM79 message, which is of the form: “CLEARED TO [waypoint] VIA ROUTE CLEARANCE.”

This Quick Topic video has been put together to explain what this message means and what it does not mean when it appears on your aircraft’s CPDLC display, as in Figure 1.

For additional information on datalink (and more), visit the free Virtual Classroom on the Honeywell Pilot Gateway.

Program Pilot Ryan Milmoe supports Embraer and Dassault EASy for Honeywell Flight Technical Services. He can be reached via email at Ryan.Milmoe@Honeywell.com

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