What was found
FLOORBEAM TOP CAP AT LBL 27 FROM BS 621 - 559.00+64 IS CORRODED IN MULTIPLE AREAS AND AT NUT PLATE LOCATIONS. BLENDED CORROSION IAW SEM 51-21-06, FOUND TO BE OUT OF LIMITS DUE TO 100 PERCENT MATERIAL LOSS AT MULTIPLE NUTPLATE LOCATIONS. REMOVED THE FLOOR BEAM TOP CAP BETWEEN FS 621-FS 559+64 AT LBL 27 IAW SRM 541-42-06, 51-42-21. COMPLIED WITH ECTC REO 601R-53-61-3778 AND GREO 601R-53-61-3778, REV A, DATED: 07/15/2011 AS WRITTEN. LOCATED FASTENERS HOLES TO MATCH EXISTING HOLE SIZE IN NEW BEAM CAP, FS 559+64 TO FS 621 AT LBL27 IAW SRM 51-40-11. INSTALLED NEW SEAT RAIL BEAM, CAP SECTIONAL IAW REO 601R-53-61-3778.