What was found
DURING C-CHECK INSPECTION REVEALED 6 CRACKED STRUT FRAME ATTACH FTTINGS IN THE LOWER FUSELAGE CARGO COMPARTMENTS ON THE LEFT SIDE. CLOSER INSPECTION REVEALED THE CRACKS TO BE CORROSION CRACKS ALONG GRAIN LINES. THREE FRAMES WERE REPLACED IAW THE DOUGLAS SRM AND 3 OF THE FRAMES WERE REPAIRED IAW KITTY HAWK E.A. D9-53-018. THE AIRCRAFT WAS RETURNED TO SERVICE. REF: STA 294, 313, 332, 408, 699, 766 BETWEEN L22L AND L25L. (X)