What was found
MAIN CABIN FLOOR STRUCTURE HAS CORROSION AT FRAME 17 & RBL 13 - 42. FOUND DURING OK TO CLOSE. ACCOMPLISHED PERMANENT REPAIR IAW EO E175-53MR-205 REV IR WO 1944007. THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH THE PERMANENT REPAIR OF CORROSION DAMAGE TO THE CROSSBEAM FRAME 17 PN 170-21769-405, UPPER FLANGE LOCATED BETWEEN Y=15 & Y=42.7, OTBD OF TRACK Y=11, REF ETD 2015-170-073605B, FIGURES 1 & 2. THE APPROX DAMAGE DIMENSIONS ARE AS FOLLOWS, 27.50 INCHES X .90 INCH WITH 100% EXFOLIATION. REQUESTED & RECEIVED A REPAIR IN THE FORM OF ETD 2015-170-073605B FOR THE ACCOMPLISHMENT OF THE CROSSBEAM FRAME 17 REPAIR ANGLE APPROVAL. BECAUSE THE FLOOR CROSSBEAM FRAME 17 IS PSE & FCS, ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED AS A MAJOR REPAIR.