As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SATCOM INOPERATIVE. PROMPT DOES NOT APPEAR ON THE FMC, SATCOM SWITCHES DO NOT WORK. THE SATCOM PROMT CAME BACK ABOUT 30 MIN LATER AND THE SYS WORKED CORRECTLY. ACFT GROUNDED. PERFORMED SATCOM SYS TEST REF MM 23-15-00-730-801. OPS NORMAL. CYCLED POWER NUMEROUS TIMES, SATCOM PROMT RETURN IN UNDER A MIN. NO HISTORY PAST 30 DAYS FOR NO PROMPT.