What was found
AFTER LANDING, DURING FLAP RETRACTION, A LOUD POP WAS HEARD BY BOTH PEOPLE ABOARD. DURING POST FLIGHT IT WAS FOUND RT FLAP HAD BOUND ON BRACKET PN 0523231-5 DURING RETRACTION CAUSING DAMAGE TO FLAP, BRACKET, AND FLAP TRACK BRACKET. CRACKS FOUND IN THE LOWER ELBOW OF FLAP TRACK BRACKET PN 0523231-8 AND 0523231-7 APPEAR TO BE CAUSED BY THE FLAP BINDING. INSPECTION OF LEFT WING FLAP SYSTEM FOUND NO DEFECTS. NO RECORD OF BRACKET 0523231-5 BEING CHANGED WAS FOUND IN LOG BOOKS, IT IS ESTIMATED THIS IS ORIGINAL.