What was found
AFT PRESSURE BLKD WEB FWD FACE CRACKS OF 3.500" AND 4.500" APPROX AT STA 1766.000 L-10L TO L-11L (MAJOR REPAIR). PERFORMED MAJOR REPAIR IAW AD90-16-05, SB DC8 53-073, DWG SR08530007. REMOVED FASTENERS IAW SRM51-1-21. CUT OUT DAMAGED SECTION AND FABRICATED (2EA) FILLERS (AL7075T6 0.050") (1EA) DOUBLERS (AL7075T6 0.032") AND DOUBLER (AL7075T6 0.063") IAW DWG SR08530007, SRM 53-2-5 FIG 14A, TR# 53-194 DATED 03-22-04. CLEANED, TREATED AND PRIMED AREA AND REPAIR PARTS IAW SRM 51-1-8B. APPLIED SEALANT TO FAYING SURFACES IAW SRM 51-1-11. INSTALLED REPAIR PARTS IAW SRM 53-2-5 FIG 14, DWG SR08530007, SRM 51-1-21, SRM 51-1-20D, SRM 51-3-0, SRM 51-3-1.