What was found
WHEEL ASSY INNER FLANGE FAILED INFLT. FLANGE BROKE INTO SEVERAL PIECES. TIRE (TUBE TYPE) PUSHED INWARD & PUSHING THE FLANGE PIECES INTO BRAKE ROTOR & DEPRESSED THE CALIPER PISTON. DURING FLT, PILOT NOTICED RT BRAKE PEDAL FELT LOCKED & FLUID LEAKING FROM RT BRAKE VALVE. CONTACTED BASE OF OPS & NOTIFIED GROUND PERSONNEL HE WAS GOING TO LAND ON A DIRT STRIP NEXT TO RUNWAY. ON TOUCHDOWN, RT BRAKE CALIPERS DEPARTED. ACFT VEERED TO RT, CROSSED & WENT OFF THE RUNWAY & INTO A DITCH. ACFT SUSTAINED DAMAGE TO LT & RT WING SPARS, ENGINE & PROP. VISUAL INSPECTION DID NOT LOCATE INITIAL FAILURE POINT OF FRACTURE.