What was found
AFT CARGO FRAME HAS CORROSION AT FR 88 BETWEEN STR 28R - STR 27R. (MAJOR REPAIR) (LEVEL 2 CORROSION) BLENDED CORROSION ON AFT CARGO FRAME 88 BETWEEN STR 28R - 27R IAW E-175 SRM 51-10-03. BLENDED AREA MEASURES L= 6" W=4" H=.027". ORIGINAL THICKNESS .063" IAW E-175 SRMI 53-23-04. MATERIAL REMAINING IS .036" OUT OF LIMITS PER E-175 SRM 51-75-16. LOCATED AND DRILLED LOWER SECTION OF AFT CARGO FRAME 88 IAW E-175 SRM 51-40-02. PN 170-65735-003. PRIMED ALL HOLES REF EMB 175 SRM 51-23-05 AND ENVOY ETN-EJ-51-025. TOP COATED ALL NEW FASTENERS REF EMB 51-23-06 AND ENVOY ETN-EJ-51-015. REMOVED AND REPLACED LOWER SECTION OF AFT CARGO FRAME 88 IAW E-175 SRM 51-40-08.