What was found
WHILE A/C WAS IN FOR HEAVY CHECK FOUND FWD FUSE INBD FLOORBEAM CORRODED AT FR 16-19. MX REMOVED AND REPLACED THE FWD FUSE INBD FLOORBEAM IAW EMB 175 SRM 51-40-02, 51-43-01, 51-43-02, 51-41-01. PN 170-03264-001. A/C REMAINS IN CMH FOR HEAVY CHECK COMPLETION.