What was found
FLIGHT CONTROL ISSUE, FLIGHT DIVERTED. ON TAKE OFF, EXCESSIVE RUDDER TRIM ON CLIMB. RT INBD AIL ON EICAS SHOWS IN UP POSITION. CONFIRMED BY F/O, RT INBD AIL NOT MOVING, STUCK IN UP POSITION. RUDDER SYS FOUND NORMAL AT CTR WITH 0 TRIM. WITH CTR SYS ONLY PRESSURIZED ABLE TO ACTUATE RT INBD AIL UP AND DOWN STOP TO STOP WITH HAND PRESSURE. REPLACED RT INBD CTR SYS ACTUATOR. SYS OPS NOW NORMAL. FOUND CTR ADP NOT PRODUCING SUFFICIENT PRESSURE (2760-2790 PSI) IAW SPECS. INOP CTR ADP IAW MEL. REPLACED ADP IAW MM.