As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DATALINK LOST NO DATA LINKS ESTABLISHED (HF, VHF, SATCOM MODES DATALINKS LOST) ADVISORY CREW COMMENTS: OCCURRED 10+ TIMES IN 4 HOURS OF FLIGHT. REPLACED RADIO FREQUENCY UNIT REF: FIM 23-15 TASK 802 PCN 580-9105. REF; MM 23-15-11 PG 401, OPS CHECK GOOD.