As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SATCOM 1 AND 2 WOULD NOT TRANSMIT OR RECEIVE. ACFT GROUNDED. CHECKED LED STATUS LIGHTS ON IRIDIUM TRANSCEIVER, ALL GREEN. ACCOMPLISHED VOICE TEST OF BOTH INCOMING AND OUTGOING CALLS FOR SAT 1 AND SAT 2. GROUND VERIFICATION TEST PASSES, IAW AMM 23-15-00/501.