As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND FAULT CODES 73-31351. THE APL VOLTAGE INPUT TO THE EEC IS OUT OF RANGE, LONG TERM FAULT, AND FAULT CODE 74-30971. THE APL INPUT VOLTAGE FOR THE LT EXCITER LT IGN IS OUT OF RANGE, LONG TERM FAULT. FOUND WHILE PERFORMING TASK CARD 78273000 ON NR 1 ENGINE. ACFT GROUNDED. ON DEFERRAL.