What was found
PILOT REPORTED INTERMITTENT ELECTRICAL OR AUTOPILOT SERVO PROBLEM ON TAKEOFF WHICH CREATED STIFF ROLL CNTRLS, RETN DEPARTURE AIRPORT, LANDED WITHOUT INCIDENT. MX EXTENSIVE INSP OF FLT CNTRL CABLING, CHAIN & SPROCKET & CNTRL WHEEL AREAS, CNTRL RODS & TORQ TUBE INSP FOR FREEDOM OF MOVEMENT AND/OR CROSSED CABLES. REPAIRS TO AILERON LIMIT SW, RPLD CNTRL A/P SERVO BRACKET, MOTOR, NEW CNTRL CABLE. RETN ACFT TO SERVICE, GRD OPER CHKS OK. SUBSEQUENT FLT, SIMILAR BINDING AND/OR STIFFNESS & INSP FND (FOD) (A PAN HEAD SCREW, AN526,) FND LODGED BTWN SEGMENTS OF ROLL CNTRL CHAIN & CAUSED BINDING, STIFFNESS WHEN IN CONTACT WITH ROLL CNTRL SPROCKET. SCREW (FOD) REMOVED, A/C RETN TO SERV, NO RECURRING PROBLEMS.