What was found
DISCREPANCY: DURING C-CHECK IN KDHN, COMMERCIAL JET FOUND THE FUSELAGE FRAME AT F.S. 110 LH CRACKED BELOW FLIGHT DECK WINDOW CORRECTIVE ACTION: COMMERCIAL JET IN KDHN VERIFIED CRACKED FRAME. THEY CUTOUT CRACKED SECTION OF FRAME SECTION IAW DC9/MD80 SRM 51-70-5. THEY FORMED FRAME REPAIR SECTION FROM .063” 7075-0 AND REPAIR DOUBLER FROM .071” 7075-0 IAW DC9/MD80 SRM 51-10-2 AND 51-70-5. HEAT TREATED REPAIR PARTS FROM 0 TO T6. THEY DRILLED, DEBURRED, AND TREATED AND PRIMED FORMED FRAME REPAIR SECTION AND REPAIR DOUBLER IAW DC9/MD 80 SRM 51-10-3. THEY INSTALLED FRAME REPAIR SECTION AND REPAIR DOUBLER ON FRAME AT STATION 110 LH BELOW FLIGHT DECK WINDOW IAW DC9/MD80 SRM 51-70-5 FIG. 1 AND SRM 51-30-5