As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4148 - CREW NOTICED 50 PERCENT TORQUE FLUX LT ENGINE, ELECTED TO RETURN TO FIELD. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED LT ENGINE NP SENSOR IAW MM 77-12-00. GROUND CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.