What was found
***CORROSION*** ON FR81, AREA FWD OF AFT EQUIPMENT BAY ACCESS DOOR, BTW LBL16 TO RBL6. REMOVED AND REPLACED FRAME ON FR81 BETWEEN STRINGER 18L TO 17R PER A220 ASRP BD500-A-J51-42-21-00AAA-078A-A AND BOMBARDIER DWG C01409001 REV -D. (LP# 0964104)