What was found
MULTIPLE SPOTS OF CORROSION FROM FRAME 13 TO 17 AT X 4520 TO 5064 & Y 230. REPLACED THE RT FLOOR TRACK PN 170-03263-001 IAW THE ACCOMPLISHMENT INSTRUCTIONS OF EO E175-53MR-062 REV5. THIS AIRCRAFT CANNOT BE RELEASED TO SERVICE. THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO THE ON CONDITION REPLACEMENT OF A DAMAGED OR PREVIOUSLY REPAIRED RT FLOOR TRACK PN 170-03263-001 BETWEEN FRAMES 12 TO 20 WITH A NEW PN 170-03263-001 FLOOR TRACK. THE FLOOR TRACK WILL BE REPLACED USING EMBRAER PRODUCTION DRAWINGS. BECAUSE THE TRACK IS A PSE, ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED AS A MAJOR REPAIR.