What was found
CENTER LT FLOOR BOARD CORRODED BEYOND LIMIT. FOUND 5 HAT CHANNELS CRACKED AFTER FLOOR BOARD AND DOUBLER REMOVED; STOP DRILLED 9 EACH IAW DC9 SRM 53-01, FIG 1. NDT VERIFIED ALL CRACKS TERMINATED IAW DC9 NTSPM PT-08 PER HFEC INSPECTION. FABRICATED NEW DOUBLER IAW DC9 SRM 53-01, FABRICATED NEW HAT CHANNEL DOUBLER. INSTALLED NEW DOUBLERS AND FLOOR BOARD IAW DC9 SRM 51-30-1, 51-30-2 AND 53-20-1.