What was found
SJO - DURING C-CHECK, IN THE PASSENGER CABIN AFT LAVATORY AREA, BETWEEN BS 967 AND BS 987, WL 208.1, RBL 17 INCH, FLOOR SUPPORT (INTERCOSTAL) WAS FOUND WITH CORROSION. REPAIRED FLOOR SUPPORT CHANNEL BETWEEN BS 967 AND BS 987, RBL 17 INCH PER COOPESA EO COO-3-53-231-99 DATED APR 7, 1999. (M)