What was found
DURING HEAVY MAINTENANCE: CORROSION ON FLOOR-BEAM, UPPER SURFACE, LOCATED ON FR 17, + .617, STGR 17R, IS BEYOND ALLOWABLE E190 SRM LIMITS; REMOVED AND REPLACED FLOOR-BEAM (P/N: 170-03263-001, TRACK, RIGHT-FLOOR, FWD.) LOCATED BTW FR 12 AND FR 20, PER E190 SRM: 51-40-08. CROSS-REF. AEROMAN NR# 2018-245816. (CONSIDERED A MAJOR REPAIR)