What was found
DURING THE B2 BASIC CHECK AT EAMS, CRACK DAMAGE WAS DISCOVERED ON THE LH HORIZONTAL STABILIZER RIB 12A FLANGE. THIS EO IS BEING ISSUED TO ACCOMPLISH THE PERMANENT REPAIR OF THE LH HORIZONTAL STABILIZER RIB 12A BY REMOVING AND REPLACING IT WITH A NEW PART. PART REPLACEMENT WILL BE ACCOMPLISHED IN ACCORDANCE WITH EMBRAER DRAWINGS LISTED IN THE REFERENCES AND SRM CHAPTER 51 STANDARD PRACTICES. SUPPLEMENTAL FOLLOW-ON INSPECTIONS ARE NOT BE REQUIRED FOR DIRECT REPLACEMENT OF THE PART. BECAUSE THE LH HORIZONTAL STABILIZER RIB 12A IS PSE AND ACCESS FOR REPLACEMENT IS COMPLEX, ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED BY COMPASS ENGINEERING AS A MAJOR REPAIR. EO E175-55MR-037 IS BEING ACCOMPLISHED BY WO 2836858