As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS UNABLE TO HEAR AUDIO SATCOM 12. DATA NORMAL DISPATCH SAYS THEY CAN HEAR PILOTS WHEN CALL IS MADE. ACFT GROUNDED. PERFORMED SATCOM NR 1 & NR 2 ADJ/TEST IAW AMM 23-15-00, BOTH SYS TRANSMITT & RECEIVE NORMAL DURING CALLS, SAN GND-TO-DISPATCH. GROUND VERIFICATION SUCCESSFUL - NO HISTORY OF THIS PROBLEM LAST 90 DAYS.