What was found
C-CHECK, UPPER CARGO COMPT AT STA 1600 CIRCUMFERENTIAL FRAME AT CUSP LINE IS CRACKED RT SIDE. CUT OUT CRACKED SECTION OF FRAME AT FS 1580 RT CARGO CABIN IAW DC-8 SRM 53-2-0 FIG 2. FABRICATED NEW SECTION OF FRAME: 7075-0 0.080' (6 X 2.5) & SPLICE FROM 7075.0 0.080 (10 X 2.5) IAW MHA ENGINEERING NR 3126. HEAT TREATED FRAME & SPLICES 7075-0 TO 7075-T6 IAW DC-8 SRM 51-1-1, PG 1 TO 21. CLEANED REPAIR AREA PER SRM 51-1-8 PAR 6A. DRILLED NEW SECTION OF FRAME & SPLICES PER SRM 51-3-2 PG 1, 51-1-24, PG 1. TREATED & PRIMED AREA & PARTS IAW DC-8 SRM 51-1-8 PG 13 & 16. INSTALLED FRAME REAPIR IAW DC-8 SRM 51-1-20D, PAR 7.