Thales is the vendor. Moisture was getting onto the antenna, my guess from cold soaking and condensation, but there should be a heat element for that?

https://www.thalesgroup.com/en/connectivity-solutions

Testing and further installs start soon, full fleet end of 2021.

CPDLC is installed in @ 11 airplanes. Will go active JAN or FEB. No plan yet for installing on entire fleet.