As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION AT AN EXISTING EXTERNAL REPAIR DOUBLER ON THE LOWER FUSELAGE SKIN PANEL, BETWEEN BS 259.5 AND BS312, AT STRINGER 20R. REMOVAL OF THE DOUBLER REVEALED EXTENSIVE CORROSION DAMAGE. THE SKIN WAS TRIMMED TO REMOVE CORROSION DAMAGE BELOW THE FORWARD LAVATORY SERVICE DOOR. A NEW EXTERNAL REPAIR DOUBLER WILL BE INSTALLED PER DL ERA 302687-14.