As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TASK CARD 78273000 FOUND FAULT CODE 73-31351 THE APL VOLTAGE INPUT TO THE EEC IS OUT OF RANGE (SHORT TIME). GROUNDED - YES. PERFORMED FIM 73-22 TASK 808. NO DISCREPANCIES OR FAULTS FOUND AS OF THIS TIME DURING TROUBLESHOOTING. PERFORMED EECT BITE PROCEDURE, REF FIM 73-00 TASK 801. NO EEC FAULTS FOR # 1 ENGINE UNDER CURRENT STATUS OR FAULT HISTORY. GROUND VERIFICATION SUCCESSFUL.