What was found
AFTER SELECTING FLAPS 45 & AN INDICATION OF FLAPS 45 IS SEEN, A BUMP COULD BE BARELY FELT IN THE YOKE ALONG WITH A SUBSEQUENT ROLL TO THE RIGHT. AIRCRAFT REQUIRES 50% LT AILERON TRIM TO MAINTAIN WINGS LEVEL ATTITUDE AT APPROACH SPEED. FLT 1300 THOROUGHLY CLEANED ALL FLAP SURFACES & BLENDED ALL SHARP PAINT EDGES. USING A DIGITAL PROTRACTOR VERIFIED ALL FLAP SURFACE POSITIONS TO BE CORRECT AT 8, 20, 30, & 45 DEGREES. REPLACED THE LT & RT INBD BUTE DOOR ACTUATOR LEVER & CONTROL ROD PINS, ALSO THE LT CTR CONTROL ROD PINS.