What was found
DURING CLIMB, HAD A WARNING MESSAGE OF THE NR 2 THRUST REVERSE UNLOCKED, RETURNED TO DEPARTURE. UNEVENTFUL LANDING. PERFORMED FAULT ANALISYS IAW TSM 78-30-00-810-844-A, REPLACED THE HCU, REPLACED THE NON-LOCKING ACTUATORS FOR THE NR 2 THRUST REVERSER IAW AMM 78-32-48, AMM 78-32-43 PB401. TESTED NORMAL.