What was found
DURING HEAVY MAINTENANCE: CORROSION CENTRAL BEAM LH FR 12-20 AT PASSENGER CABIN FLOOR STRUCTURE; FOUND OUT OF LIMITS. REPLACED BEAM IAW EMB 190 SRM 53-10-10/AD 51, 51-41-01, AND 51-43-03. WORK ACCOMPLISHED ON TOMX NE 00148. ( CONSIDERED AS A MAJOR REPAIR)