What was found
AFTER POWER TRANSFER, SATCOM PROMPT ON MCDU MENU PAGE WAS NOT DISPLAYED. ACFT GROUNDED. FOLLOWED QRH, SATCOM LOCK-UP, PROMPT WAS DISPLAYED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER POWER TRANSFER, SATCOM PROMPT ON MCDU MENU PAGE WAS NOT DISPLAYED. ACFT GROUNDED. FOLLOWED QRH, SATCOM LOCK-UP, PROMPT WAS DISPLAYED.