What was found
MODIFICATION DOUBLER AT AFT LWR CORNER OF RT PRIMARY HEAT EXCHANGER WITH 0.75 CRACK IN IT, STA 12.000 L-27R FUSELAGE EXTERIOR. PERFORMED MAJOR REPAIR. REMOVED ALL FASTENERS WITHIN THE REPAIR AREA IAW SRM 51-1-20D PG 21, SRM 51-3-0 PG 1. PERFORMED STOP HOLE AT END OF CRACK IAW EO AST050402. PERFORMED NDT INSP IAW NDT SPM PART 06-10-01-001. FABRICATED REPAIR DOUBLER (AL2024T3 0.050), REPAIR TRIPLER (AL2024T3 0.050) IAW EO AST 050402. CLEANED, TREATED AND PRIMED AREA AND REPAIR PARTS IAW SRM 51-1-8B. APPLIED SEALANT TO FAYING SURFACES IAW SRM 51-1-11 PG 9. INSTALLED REPAIR PARTS IAW EO AST050402, SRM 51-1-20D PG 9, SRM 51-3-0 PG 1. TORQUED NUTS IAW SRM 51-3-1.