What was found
DURING GO AROUND AND REPEATEDLY SELECTING GO AROUND WITH THROTTLE AND TRP, THROTTLES DID NOT ADVANCE. MINIMAL THRUST RESPONSE TO MANUAL THROTTLE MOVEMENT. FCP STUCK IN LAND MODE EVEN AFTER MOVING VNI SWITCHES TO NAV AND CHANGING ILS FREQ WITH AUTOPILOT DISCONNECTED. FLT CONTROLS WERE STIFF AND DIFFICULT TO MOVE. FMA'S BLANK EXCEPT FOR MANUAL THRUST ILLUMINATED. REPLACED FCU, 2 EA FCCS, TCC, AND TRP. MX PERFORMED ACCEL/DECEL POWER CHECKS FOR BOTH ENGINES.