What was found
DURING MOD REPAIR, NUMEROUS DEFECTS FOUND RELATING MAINLY TO CORROSION IN WING & ATTACH STRUCTURE. FOLLOWING DEFECTS FOUND, EXFOLIATION OF EXTRUSIONS ON REAR SPAR CAPS IN BOTH W/W. CNTR SECTION OF 1 PIECE WING OPENED UP FOR INSPECT & REVEALED OLD FIBERGLASS TYPE INSULATION & 2 DEAD RATS. CLEANING THIS AREA REVEALED SEVERE EXFOLIATION OF EXTRUSIONS AROUND LT MAIN SPAR ATTACHMENT FITTING. REMOVAL OF WING TO FURTHER ASSESS VIABILITY OR REPAIR & REVEALED MORE CORROSION OF STEEL FRAME AT WING ATTACHMENT FITTINGS AND FUSELAGE STR`S EXFOLIATING AT ATTACHMENT TO STEEL TUBE FRAME. WING ATTACHMENT BOLTS SEVERELY RUSTED & BOLTS AND LOCKWIRE WERE STILL PAINTED BLUE FROM PREVIOUS PAINT JOB TO A/C SOME YEARS PRIOR.