As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: CRACK INDICATION ON FRAME IN PASSENGER CABIN (1E/A) CRACK INDICATION FOUND ON HORIZONTAL FLOOR BEAM RADIUS OF THE BACKSIDE THE SPAR VERTICAL STR 3 ZONE 1 FR36 CENTER WING BOX CRACK LEGTH 0.318 INCH. MAINTENANCE PERFORMED PERMANENT REPAIR LOC ON HORIZONTAL FLOOR BEAM Y254 STGR 3 FR 36 CENTER WING BOX IAW EA 366035.