What was found
ON CLIMBOUT FROM CLT WHILE FLYING THE RNAV DEPARTURE, CREW HAD TO APPLY FULL LEFT AILERON TO MAKE TURN REQUIRED FOR THE RNAV DEPARTURE. CREW REPORTED THE AIRCRAFT WAS OUT OF RIGGING. APPLIED MORE THAN 1.0 UNIT OF RIGHT RUDDER TRIM IN ORDER TO TRIM THE AIRCRAFT. FLIGHT RETURNED TO FIELD AT CLT. ON RETURN TO CLT, NOTICED THE AIRCRAFT USED A MAJOR AMOUNT OF OIL. FLIGHT LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE RUDDER MAIN PCU IAW AMM 27-21-91. RIG AND OPS CHECK GOOD. ALSO, SERVICED NR 2 ENGINE OIL TO FULL CAPACITY. RAN NR 2 ENGINE AND PERFORMED LEAK CHECK. LEAK CHECK GOOD. LEAK CHECK ACCOMPLISHED AS PER AMM 71-00-00-795-004.