As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND FAULT CODE 73 30312 ON NR 2 ENGINE START. SWITCH SIGNAL AND ARINC BUSS DATA DISAGREE. COMPLETED FIM 73 24 STEP E (1) THROUGH L. NO FAULTS SHOWING AT THIS TIME. REPLACED NR 2 ENGINE EEC. REF MM 73 21 60 & MM SUPP 73 21 60. COMPLETED FIM 73 24 TASK 813. REPAIR CONFIRMED.