As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 TORQUE DIGITAL GAUGE SHOWING ONLY DASHES. CREW ELECTED TO RETURN TO DEPARTURE. LANDED WITHOUT INCIDENT. NO EMERGENCY DECLARED. AFTER EXTENSIVE TROUBLESHOOTING, MAINTENANCE CLEANED PIN A AT WIRE P10. RECONNECTED WIRE AND PERFORMED ENGINE RUN. NO FAULTS NOTED. AIRCRAFT RETURNED TO SERVICE.