What was found
AIRCRAFT RETURNED, DURING TAKEOFF, N1 LIMIT WINDOW WAS WITHOUT INFORMATION AND A/T AND L NAV IN AUTOMATIC MODE DID NOT ENGAGED. AT 400 FT ENGAGED L NAV WITH ACCELERATORS IN AUTOMATIC MODE, APPEARING UPPER DU DE A/T LIMIT LEGEND. FCC INTERCHANGED, BITE WAS PERFORMED IN CDU SHOWING FAILURE CODE 22-1063. FMC AND FCCS CHECKED IN MODES VNAV AND LNAV, SHOWING FAILURE CODES 22-11822, 22-11210 & 22-11209, IT WAS DETERMINED THE FMC OUT OF SERVICE, THEREFORE FMC WAS DEFERRED IAW MEL 34-36-2B2. ADDITIONALLY, OVERWEIGHT INSPECTION WAS PERFORMED IAW MM 05-51-35 PHASE 1-2A, ALL CORRECT. DURING OVERNIGHT CHECK AT MEX, FMC TRANSFER RELAY NR 2 R476 WAS REPLACED, TESTED CORRECT IAW MM 34-61-00, DEFERRED REPORT WAS CLOSED.