What was found
0.500 CRACK IN SKIN OF RT PRIMARY HEAT EXCHANGER AFT LWR CORNER STA -12.000 L-27R (MAJOR REPAIR). PERFORMED MAJOR REPAIR IAW FAA FORM 8110-3 DATED 03-16-05 DWG X83-R05, REV IR DATED 03-01-05. REMOVED FASTENERS IAW SRM 51-1-21 PG 1. CUT OUT DAMAGED SECTION IAW DWG X83-R07. PERFORMED NDT INSP IAW DC8 NDT SPM PART 06-10-01-001. FABRICATED REPAIR DOUBLER (AL2024-T3 0.050) REPAIR TRIPLER (AL2024-T3 0.063) AND FILLER (AL2024T3 0.100) IAW DWG X83-R05. CLEANED, TREATED AND PRIMED AREA AND REPAIR PARTS IAW SRM 51-1-8B. INSTALLED REPAIR PARTS IAW DWG X83-R05 SRM 51-1-20D PG 9, SRM 51-1-21 PG 1, SRM 51-3-0 PG 1, SRM 51-1-26. TORQUED IAW SRM 51-3-1.