As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SATCOM NOT PROMPTED ON MCDU PERFORMED QRH FOR LOCK-UP. STLL NOT PROMPTED. ACFT GROUNDED. VERIFIED NO PROMPT ON MCDU FOR SAT. REMOVED & REPLACED IRIDIUM TRANSCEIVER IAW AMM 23-15-00-400-801. CHECKED GOOD. SATCOM LINK TEST SUCCESSFUL. OPS NORMAL.