What was found
WITH FLAPS IN APPROACH MODE, ACFT EXPERIENCED SLIGHT YAW TO THE RT. AS POWER WAS FURTHER REDUCED FOR LANDING, THE YAW INCREASED. PILOT WAS UNABLE TO CORRECT WITH RUDDER & AILERON. AFTER GO AROUND AT SAFE ALTITUDE, FLIGHT CREW ATTEMPTED TO DUPLICATE THE PROBLEM & WERE UNSUCCESSFUL. CLEANED OIL & DEBRIS FROM RT GND STOP SOLENOID. FOUND NO GND FINE ON LT ENG, ADJUSTED LT INPUT ROD END TO POWER LEVER, ADJUSTED TQ IDLE LOW. DEAD BAND LT, ADJUSTED RT IDLE & TQ ALL PARAMETERS FOUND GOOD.