What was found
LCQ - MAJOR REPAIR - DURING C-12 CHECK EXFOLIATION CORROSION WAS FOUND ON UPPER SURFACE OF FLOORBEAM THAT EXTENDS UNDER R-1 DOOR THRESHOLD DRAIN PLATE BS 365, RBL 45 TO RBL 62. MAINTENANCE REMOVED CORRODED SECTION OF FLOORBEAM BS 365, RBL 45 TO RBL 62; FABRICATED A NEW REPLACEMENT SECTION OF CHORD, 2 EACH REPAIR ANGLES & STRAPS; INSTALLED REPAIR PARTS IAW B757 SRM 53-00-51 FIG 203, SHTS 1-5.