What was found
DURING BC-4 CHECK CORROSION WAS FOUND LOWER SIDE OF FLOOR PANEL 222 FF, FR 16, FR 20, RBL 45, RBL 60. MAINTENANCE REMOVED CORROSION ON LOWER SURFACE OF FLOOR PANEL 222 FF; FABRICATED A REPAIR DOUBLER; INSTALLED DOUBLER ON LOWER SURFACE OF FLOOR PANEL IAW AWA ER 26-5312-00151-BA1.