As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA - UPON CLIMB-OUT, NR 1 ENGINE EXPERIENCED AN UNSCHEDULED FEATHERING OF THE PROPELLER. MAXIMUM ENGINE TORQUE APPROXIMATELY 109 PERCENT FOR 5 SECONDS. CREW SHUT DOWN NR 1 ENGINE AND RETURNED TO THE FIELD. REMOVED AND REPLACED NR 1 TSCU AND NR 1 ECU. CLEANED AND INSPECTED CANNON PLUGS. GROUND RUN CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. REFERENCE: OPERATOR CONTROL NR PCAA9500256. AIRCRAFT TOTAL CYCLES, 3,524.