As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SATCOM INOPERATIVE. NO SELECTION IN FMC DISPATCH TRIED TO CALL WITH NO SUCCESS. ACFT GROUNDED. CYCLED THE SATCOM CIRCUIT BREAKER IAW THE QRH PROCEDURES. ACCOMPLISHED SATCOM VOICE TEST FOR OUTGOING CALL AND INCOMING CALL TO DISPATCH SYS 1 AND 2. AMM 23-15-00-730-801, STEP 1A WITH NO DEFECTS.