As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SS1D INSPECTION OF E AND E DOOR CUT-OUT AREA, FOUND CORROSION IN T-CHORD FRAME AND SKIN IN LT FRAME STR 27. SUSPECT CAUSE DUE TO LAVATORY DRAIN LEAK AND LACK OF PROPER DRAINAGE. SUBMITTER STATED ATTENTION SHOULD BE PAID TO ANY FLUID LEADS IN FWD GALLEY AND LAV AREA AND ANY DEBRIS BLOCKING DRAIN HOLES IN LOWER FUSELAGE.