As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EUG FLIGHT NR 2166, AFTER STARTING ENGINES AND RUNNING CHECKLIST. ADDED POWER TO INITIATE RIGHT RUN OUT OF PARKING SPOT. UPON ADDING POWER TO NR 1 ENGINE, NOTICED TORQUE INCREASE RAPIDLY TO YELLOW ARC. SOUNDED AS IF PROP FEATHERED, BUT DID NOT NOTICE NP GAUGE. RETURNED TO DISC AND ENGINE RETURNED TO NORMAL. MAINTENANCE REPLACED NR 1 ENGINE PCU IAW MTC 9612201. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.