As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND EXFOLIATING CORROSION ON FUSELAGE AT DUMP FITTING MOUNTING FLANGE AREA. CORROSION WAS ISOLATED TO MID LAV DUMP VALVE ATTACH DOUBLER REF DWG 143N3412. REMOVED CORRODED DOUBLER AND FABRICATED REPLACEMENT DOUBLER USING .063 2024 T3 PART IS IN SHEET METAL SHOP CURING PRIMER. CLEANED PAN AREA WHERE DUMP VALVE ATTACHED AND PRIMED.