What was found
DURING ROUTINE C-CHECK INSP, RT AFT HEAT EXCHANGER LT LWR CORNER CRACKED .5 INCH APPROX. PERFORMED MAJOR REPAIR IAW NR 05580 DATE 12-21-05, DWG NR ED 4114 DATE 12-17-05, EO 20051435 DATE 12-21-05. REMOVED FASTENERS IAW SRM 51-1-21. REMOVED DAMAGED SECTION IAW DWG ED-4114. PERFORMED NDT INSPECTION IAW NDT IAW NDT SPM PART 06-10-01-001. FABRICATED REPAIR DOUBLER (ALCLAD 2024 T3 0.050”) + REPAIR TRIPLER (ALCLAD 2024 T3 0.063) + FILLER (ALCLAD 2024 T3 0.100) IAW DWG NR ED 4114. CLEANED, TREATED AND PRIMED AREA + REPAIR PARTS IAW DC-8 SRM 51-1-8B. APPLIED SEALANT TO FAYING SURFACES IAW DC-8 SRM 51-1-11. INSTALLED REPAIR PARTS IAW DWG ED 4114, SRM 51-1-21, SRM 51-1-20D AND SRM 51-3-1 (TORQUE)