As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 EEC LOGGED LONGTIME FAULT 73-31162. MECHANIC OVERSPEED PROTECTION SIGNAL IS OUT OF RANGE. ACFT GROUNDED. COULD NOT DUPLICATE MALFUNCTION. INSPECTED APPLICABLE EEC & HMU CONNECTORS. RANG THRU HMU SWITCH FROM EEC. SHOOK WIRING. NO DEFECTS NOTED. ALSO VERIFIED "N2 AT/ABOVE IDLE" DISCREET DURING ENGINE RUN.