As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENG FMC DISPLAYED FAULT CODE 73 30311 START SWITCH SIGNAL & ARINC BUS DATA DISAGREE. GROUNDED YES. PERFORMED FIM 73 247 00 810 813 F00 NO RECENT FAULT ON NR 1 ENG EEC BITE. FAULT CODE HAS MOVED TO FLT LEG 5 ON FAULT HISTORY WITH NO OTHER OCCURENCE. CDS DISCRETE TEST PASSED.