As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE FOUND AFT DRAIN MAST FWD & AFT ANGLE BRACKETS ARE CORRODED. REMOVED CORRODED AFT DRAIN MAST FWD & AFT ANGLE BRACKETS REF SRM 51-41-01; 51-41-02. DAMAGE LENGTH 3", WIDTH 0.4" AND DEPTH0.009". LOCATED AND DRILLED NEW PARTS REF SRM 51-40-02. INSTALLED NEW AFT DRAIN MAST INTERNAL FWD &AFT ANGLE BRACKETS REF SRM 51-41-01:51-41-02. THIS ITEM HAS BEEN CLASSIFIED AS A LEVEL 2, CORROSION.