As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - ON FLIGHT 2310, RETURNED TO FIELD, AFTER TAKEOFF FELT AND HEARD A THUMP FOLLOWED BY AN UPTRIM AND AUTO FEATHER NR 1 ENGINE FAILED, NO FIRE. RETURNED AND LANDED IN RDD. MAINTENANCE REMOVED AND REPLACED NR 1 ENGINE. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.