What was found
SATCOM PROMPT ON FMC DISAPPEARED ON ELECTRICAL BUS TRANSFER. ACFT GROUNDED. SATCOM LOCK UP QRH PROCEDURE PERFORMED ON GROUND, SATCOMM PROMPT WAS RESTORED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
SATCOM PROMPT ON FMC DISAPPEARED ON ELECTRICAL BUS TRANSFER. ACFT GROUNDED. SATCOM LOCK UP QRH PROCEDURE PERFORMED ON GROUND, SATCOMM PROMPT WAS RESTORED.