What was found
"D" CARGO DOOR JAMB FWD LWR CORNERS CRACKED (MAJOR REPAIR). PERFORMED MAJOR REPAIR IAW AD2005-18-07, S/B DC8 53-078, DOUGLAS DWG SR08530019, 5750776. REMOVED PARTS TO GIVE ACCESS IAW SRM 51-1-21, SRM 51-1-20D. PERFORMED EDDY CURRENT INSPECTION OF EXT SKIN, INTERNAL DOUBLER, INTERNAL SKIN AND PRESSURE SEAL IAW BOEING DC8 NDT SPM PART 06-10-01-001 AND PERFORMED X-RAY INSPECTION OF "D" CARGO DOOR JAMB. NO CRACK FOUND IAW BOEING DC8 NDT SPM PART 02. ENCLOSED SMN FORM 242-1, 242-2. FABRICATED EXT REPAIR DOUBLER (AL7075T6 0.090") AND EXT REPAIR TRIPLER (AL7075T6 0.125") IAW DOUGLAS DWG NR SR08530019, SRM 51-1-11, SRM 51-1-21, SRM 51-1-26, SRM 51-1-20D, SRM 51-3-1 (TORQUE) WITHIN 17,000 LANDING CYCLES. PERFORM NON DESTRUCTIVE INSP AFTER THE INITIAL INSP PERFORM REPETITIVE INSP AT INTERVALS OF 4400 LANDING CYCLES. NEXT INSPECTION AT 45448 LANDING CYCLES. NEGATIVE FINDING WITH NDT NO CRACK FOUND INSTALLED PREVENTATIVE MODIFICATION. RFES C/W.