What was found
AVC FLIGHT NR 2305: ON TAKE-OFF AT 70-80 KNOTS, GOT A POWER PLANT MESSAGE FOLLOWED BY A NR 2 PEC AND NR 2 AC GEN CAUTION LIGHTS FOLLOWED BY THE NR 2 PROP FEATHERING. MAINTENANCE REMOVED AND REPLACED NR 2 ENGINE PCU IAW AMM TASKS 61-20-11-000-801 AND 61-20-11-400-801. ALL CHECKS GOOD. NO LEAKS DETECTED. NO DEFECTS NOTED WITH AC GEN OPERATION. AC GEN LIGHT WAS DUE TO NR 2 PROP AUTO FEATHER. BETA TUBE REMOVAL/INSTALLATION IAW MTC 6610001 AND 6610002. POWER ASSURANCE RUN DOCUMENTED ON MTC 6710005. AIRCRAFT RETURNED TO SERVICE.