As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE BASE VISIT FOUND THE CENTER BEAM FORWARD OF FRAME 61 TO HAVE AN ELONGATED HOLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. ACCOMPLISHED CUT OUT OF DAMAGED AREA ON THE LAVATORY CENTER BEAM AND INSTALLED REPAIR PARTS ON LAVATORY CENTER BEAM IAW EO EM-53MR-1817. THE AIRCRAFT WAS RETURNED TO SERVICE.