FAA "Continued Airworthiness Notification"
U.S. FAA has issed CAN-2022-01-2, "Continued Airworthiness Notification to the International Community" dated Jan. 14, 2022.
Subject is 5G interference as it affects certain functions or operations of 787 aircraft, worldwide.
(Apologies, not accessing FAA link to post here - but it's quite e-z to locate)
Also, Satcom_guru has technical information in posts on the Tw soc media platform (which is how this SLF/atty learned about the referenced FAA CAN).