What was found
THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH THE PERMANENT REPAIR OF CRACK AND BEND DAMAGE TO THE TRAILING EDGE UPPER STRINGER 2 ON THE RT HORIZONTAL STABILIZER. ACCOMPLISHMENT OF THIS REPAIR WILL BE BY CUT-OUT, RECONTOURING, AND INSTALLATION OF A REPAIR DOUBLER PER ETD2017-170-000448A. ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED AS A MAJOR REPAIR BECAUSE THE AFFECTED PARTS ARE PSE AND FCS. EO E170-55MR-006.1 WILL BE ISSUED TO ACCOMPLISH FOLLOW UP INSPECTIONS: [REF TASK 55-10-001-0002 (INTERNAL GVI THRESHOLD OF 20,000 FC, INTERVAL OF 20,000 FC) IS SUFFICIENT AND IS MET USING THE INSPECTION REQUIREMENTS: MPG/MRBR REVISION NR 12. THRESHOLD IS COUNTED SINCE NEW.].