What was found
DURING HEAVY MAINTENANCE, THE NR 2 PYLON LOWER SKIN SURFACE FOUND CHAFED, INCLUDING THE HORIZONTAL DOUBLER AT RIB 5. REPAIRED THE NR 2 PYLON LOWER SKIN RIB 5 IAW SRM 54-51-12-283-003, 54-51-12-300-003, REO L21289, EC A18-277-01, AND RDAS 80441834-003-2018. CLASSIFIED AS A MAJOR REPAIR.