As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FMC CDU FAULT CODE 73-30792 FOUND. ACFT GROUNDED. R & R NR 2 ENG EEC. SOFTWARE VER 2044M25P14. EEC TEST, DISCRETES TEST, FADEC TEST, ACTUATORS TEST ALL PASSED. IDENT/CONFIG CHECKS. NO FAULTS LOGGED. REF MM 73-21-60, 71-00-00, 73-21-00.