As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION AT THE LOWER EDGE OF THE LEFT SIDE AFT LAVATORY WASTE TANK OVERBOARD VENT, LOCATED AT STA 1574 AND STRINGER S-25L. THE EXPOSED CORROSION IS APPROXIMATELY 3½ FWD/AFT AND CRACKING OCCURRED FROM THE VENT TO TWO FASTENERS WHICH HAVE PULLED THROUGH THE SKIN.