What was found
DURING ROUTINE C CHECK INSPECTION, EXTERNAL FUSELAGE AFT HEAT EXCHANGER RT LWR CORNER CRACKED 1, STA 10.000, L-27L. PERFORMED MAJOR REPAIR IAW FAA 8110.3 NR 05367 DATED 08-19-05, SEMAN DWG ED 4055 DATED 08-14-03 AND EO SEMAN NR 20051140 DATED 08-19-05. REMOVED FASTENERS IAW DC8 SRM 51-1-21 PAGE 1, DC8 SRM 51-1-20D PAGE 21. REMOVED DAMAGED AREA IAW SEMAN DWG ED 4055. PERFORMED NDT INSPECTION IAW DC-8 NDT SPM, PART 06-10-01-001. FAB`D REPAIR DOUBLER (AL 2024T3 0.050) + REPAIR TRIPLER (AL 2024T3 0.063) + FILLER (AL 2024T3 0.100) IAW SEMAN DWG ED 4055, DC8 SRM 51-1-4 PAGE 1 (FORMING). CLEANED, TREATED AND PRIMED REPAIR PARTS IAW DC8 SRM 51-1-8B. APPLIED SEALANT TO FAYING SURFACES IAW DC-8 SRM 51-1-11 PAGE 9.