As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING ROUTINE CHECKS INTERROGATE, THE FMC CDU FOR ENIGINE FAULTS FOUND A SHORT TIME FAULT NR 73 30311 "THE START SWITCH SIGNAL AND ARINC BUS DATA DISAGREE." PERFORMED FIM 73 24 00 810 F00 INITIAL EVAL NO RECENT FAULT NO FAULT HISTORY. EXAMINED ENGINE START SW PARAMETER ON APPLICABLE DEU NO FAULT NOTED.