As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SATCOM PROMPT DOES NOT APPEAR ON MENU PAGE OF MCDU. ACFT GROUNDED. UNABLE TO DUPLICATE DEFECT SATCOM PROMPT PRESENT ON BOTH MCDUS. PERFORMED SATCOM COMMUNICATION SYS ADJUSTMENT/TEST IAW MM 23-15-00-730-801, STEPS A THROUGH E ALL TESTS PASS. GROUND VERIFICATION SUCCESSFUL.