As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION WAS FOUND IN FUSELAGE SKIN AT LT AFT FUSELAGE AT VACUUM WASTE EXHAUST, STA 907-927, S21L TO S22L DURING A WALKAROUND. THE SKIN WAS REPAIRED IAW ECRA 5330-03715 AND A DIP WAS INITIATED TO PERFORM A PERMANENT REPAIR WITHIN 12 MONTHS.