What was found
WHILE HAND FLYING AND GOING FLAPS 30 TO 45, EXPERIENCED AN AGRESSIVE ROLL TO THE LEFT. COUNTERED IT WITH CONTROL INPUTS UNTIL AILERON TRIM IN. ROLL GREAT ENOUGH TO BANK ACFT 35 DEG -40 DEG LT WING DOWN. PERFORMED ABBREVIATED "ROLL WITH FLAPS DEPLOYED" WORKSCOPE IAW ENGINEERING, INCLUDING A DVI OF FLAPS, VANES AND SYMETRY. DVI FOR DIRT, GRIT, GRIME, GREASE AND DAMAGE AND PAINT FLAKING AND SEALANT. NO SIGNIFICANT FINDINGS NOTED. PERFORMED FLAP SYSTEM EXTEND/RETRACT TEST IAW 27-53-00. FLAPS EXTENDED AND RETRACTED SMOOTHLY AND EVENLY. ACFT OK FOR SERVICE.