What was found
CORROSION AROUND HIGH LOCK ON RH AFT UPPER BEAM AT FR 87, Y=10.- 748" (MAJOR REPAIR) (LEVEL 2 CORROSION) BLENDED CORROSION AROUND HI-LOK ON RH AFT UPPER BEAM AT FR 87, Y=10.748" PER EMB 175 SRM 51-10-03, UPON EVALUATION FOUND AREA TO BE L=1.1" W=.- 800" H=.050" ORIGINAL MATERIAL THICKNESS IS .070" MATERIAL REMAINING IS .- 020" AND IS OUT OF LIMITS PER EMB 175 SRM 53-23-10/AD02. LOCATED, DRILLED, DEBURRED, AND TREATED FASTENER HOLES ON NEW R/H LONGITUDINAL BEAM P/N:170-65669-004 PER EMB-175 SRM 51-40-02 AND 51-23-04. RESTORED FINISH TO NEW R/H LONGITUDINAL BEAM PER EMB-175 SRM 51-23-06, ETN-EJ-51-015, AND EMB-175 CPM 51-25-00. REMOVED AND REPLACED RH AFT UPPER BEAM AT FR 87, Y=10.748". PER EMB 175 SRM 51-40-08. LEVEL 2 CORROSION