What was found
PERFORM PREVENTATIVE MODIFICATION TO THE AFT UPPER L1 DOOR CORNER IAW AD2000-20-08, SB 53-075, DRAWING SR 085300021. DOCUMENT REPAIR IN AIRCRAFT LOGBOOK AND ON 337 FORM. PERFORMED MAJOR REPAIR IAW AD2000-20-08 S/B 53-075, DOUGLAS DWG SR085300021. REMOVED FASTENERS IAW SRM 51-1-21. FABRICATED REPAIR DOUBLER (AL7075T6 0.063") AND REPAIR TRIPLER (AL7075T6 0.080") IAW DOUGLAS DWG SR085300021. CLEANED, TREATED AND PRIMED AREA AND REPAIR PARTS IAW SRM 51-1-8B. APPLIED SEALANT TO REPAIR PARTS AND FAYING SURFACES IAW SRM 51-1-11. INSTALLED REPAIR PARTS IAW DOUGLAS DWG SR085300021, SRM 51-1-21, SRM 51-1-20D, SRM 51-1-26, SRM 51-3-1.