What was found
FOUND CORROSION ON LT FUSELAGE FWD LAV SERVICE DOOR CUTOUT AT LOWER EDGE (APPR. .5" SQ IN). REMOVED CORROSION FROM LAV SERVICE PANEL BOX AND FOUND IT TO BE OUT OF LIMIT IAW SRM 53-10-00 FIG 106. REMOVED SKIN REINFORCING DOUBLER ON INTERNAL CUTOUT AREA DUE TO CORROSION. REMOVED CORROSION AND TREATED METAL REF SRM 51-74-10, PAR 5 & SRM 51-72-10. REPLACED SKIN REINFORCING DOUBLER AND LAV SERVICE BOX IAW SRM 51-40-21, 51-72-10 AND DWG R53600013. REINSTALLED LAV DRAIN LINES AND LEAK CHECKED, FOUND TO BE SATISFACTORY IAW AMM 38-31-17-4. ALL WORK IS ON FILE AT CWF UNDER WO 00048350. THIS IS A MAJOR REPAIR IAW GMM6-2-100.