What was found
DURING HEAVY MAINTENANCE: CORROSION ON FLOOR PLATE STRUCTURE, LOCATION IS BTW FR 15 TO FR 16 AND STGR 17L, CORROSION IS BEYOND LIMITS OF E190 SRM: 53-10-10; INSTALLED NEW FLOOR PLATE DOUBLER AND FASTENERS, LOCATED BETWEEN FR 13 TO FR 16, INSIDE PASSENGER CABIN, AS PER EMBRAER E190 SRM 51-40-08. REF. P/N: 170-12118-001. REF. AEROMAN NR # 2018-245823.(CONSIDERED A MAJOR REPAIR)