What was found
DURING C CHECK INSPECT, EXTERNAL FUSELAGE LT AFT HEAT EXCHANGER RT LWR CORNER HAS NON STANDARD REPAIR. PERFORMED MAJOR REPAIR IAW FAA FORM 8110-3 NR 05582 DATED 12-23-05 SEMAN DWG NR ED-4131 DATED 12-20-05, ED SEMAN NR 2005 1436 DATED 12-23-05. REMOVED NON STANDARD REPAIR IAW DC8 SRM 51-1-20D. REMOVED DAMAGED SECTION IAW SEMAN DWG ED-4131. PERFORMED NDT INSP. IAW DC8 NDT SPM PART 06-10-01-001 FAB`D REPAIR DOUBLER + REPAIR TRIPLER + FILLER IAW SEMAN DWG ED-4131 CLEANED TREATED; PRIMED AREA + REPAIR PARTS IAW DC8 SRM 51-1-8B. APPLIED SEALANT TO FAYING SURFACES IAW DC8 SRM 51-1-11 INSTALLED REPAIR PARTS IAW SEMAN DWG ED-4131, DC8 SRM 51-1-21, DC8 SRM 51-1-20D, DC8 SRM 51-3-1 (TORQUE).