As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SATCOM SYSTEM FAILS OR NO BUS ACTIVITY. ADVISORY MSG01- ACTIVE CLIMB HARD; SATELLITE DATA UNIT (LEFT) HAS NO OUTPUT ON ANY BUS. MSG-2368801 ACTIVE CL HARD. FOUND CB-E17, SATL SDU L, TRIPPED. RESET SAME, NO HELP. DEF SATCOM SYSTEM. REPLACED SDU. OPS NORMAL ON GROUND.