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Update 03Oct: The FAA has released AC_90-117, which is their updated overview of Data Link Communications.

  • The United States ATC system transition to a National Single Data Authority (NSDA) is here.
  • The changeover will take place on 22Oct at 0330Z
  • A single CPDLC logon ID (KUSA) will be provided for domestic US airspace.
  • The initial phase is set up to issue departure clearances only
  • En-route CPDLC communications within US airspace will be implemented at a later time.
  • More details about the transition process are found here NSDA – Data Comm Program
  • We’ll post further information as it becomes available