As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CENTER OMEGA BEAM LH LOWER MATING FLANGE HAVE CORROSION FROM FRAME 48 TO 49- BEGAN REMOVING FASTENERS FROM CENTER OMEGA BEAM BY FR48-FR49. REMOVED OMEGA BEAM, CENTER, BY FR48-FR49 & BEGAN DRILLING HOLES. FINISHED INSTALLING THE NUTPLATES ON CENTER OMEGA BEAM FROM FR48-49.