As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IMMEDIATELY AFTER TAKEOFF, NR 2 ENGINE BEGAN RAPID TORQUE FLUCTUATIONS TOWARDS MAX TORQUE LIMITS. FROM THE CABIN, MECHANICS OBSERVED PROP. PITCH FLUCTUATIONS. ENGINE NR 2 WAS PRECAUTIONARY SHUTDOWN. AFTER TROUBLESHOOTING REMOVED AND REPLACED NR 2 ENGINE PCU IAW. OPS CHECK SATISFACTORY. RIL ACCOMPLISHED. (K)