What was found
THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH THE PERMANENT REPAIR OF CHAFE DAMAGE TO THE LT WING SPAR 3 ASSEMBLY MOUNT FITTING PASS THROUGH. THE DAMAGE DIMENSIONS ARE IDENTIFIED IN FIG 1 WITH A MAXIMUM DEPTH OF APPROX .100 INCHES DEEP. BECAUSE THE SPAR 3 IS A PSE, ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED AS A MAJOR REPAIR DUE TO STRENGTH RESTORATION. EO E175-53MR-179.1 WILL BE ISSUED TO ACCOMPLISH SUPPLEMENTAL FOLLOW UP INSPECTIONS IAW ETD 2015-170-044012A ANAC DER FORM ATTACHED. REF SRM PART II 51-00-05 1 FOR THE REPAIR INSPECTION CONCEPTS & PERFORM A DETAILED INSPECTION OF FWD & AFT FACES OF WING SPAR III WEB & CAPS, FROM RIB 1A TO RIB 10, LT & RT, INTERNAL SIDE OF FIXED TE BOX, INCLUDING ITS TE AREA & AT MLG COMPARTMENT, INTERVAL OF 29,860FC. ACCOMPLISHMENT OF THIS REPAIR IS ON EO E175-57MR-003 UNDER WO 1908424.