What was found
SJO - DURING C-CHECK, IN THE PASSENGER CABIN, AFT LAVATORY AREA, BS 987, BETWEEN RBL 47 INCH AND LBL 47 INCH, FLOORBEAM WAS FOUND CORRODED. REPAIRED UPPER CHORD OF FLOORBEAM, BS 987, BETWEEN LBL 51.250 AND RBL 51.250 PER COOPESA EO COO-3-53-223-99, DATED APR 8, 1999. (M)