As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SATCOM VOICE VOICE PORTION OF SATCOM FAILS. ADVISORY MSG-2360041 INACTV ER INTER. NOTE THIS IS 3RD STEP IN FIM 23-15 TASK 803, HPA FOR HGA AND RADIO FREQ UNIT HAVE BEEN REPLACED. REPLACED SDU. ACP'D SYSTEM TEST AND VOICE CALL TO TOMC, BOTH CK OK.