As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INT - DURING Q-4 CHECK VISUAL INSPECTION, FOUND 3 SCREW HOLES CORRODED .25 INCH AROUND OPENINGS, BS 720-725 RIGHT FLANGE UPPER SIDE KEEL BEAM. INSTALLED DOUBLER AFTER SPOT FACING, REPAIRED PER EA NR 41637. CORROSION TASK NR C53-212-01, CORROSION LEVEL 1. (M)