What was found
ETOPS PREDEPARTURE SERVICE CHECK PROCEDURE, AFT WASTE SYS VACUUM BLOWER VENT PORT HAS AREA WITH SKIN BULGE AND POSSIBLE CORROSION. . CUT-OUT OF CORRODED SKIN, HFEC OF CUT-OUT , & MATERIAL VERFICATION WERE ACCOMPLISHED. IAW SRM 53-60-01-2R-3. VERIFIED HFEC OF VACUUM BLOWER VENT CUTOUT REPAIR PARTS. OK TO CONTINUE WITH REPAIR. FABRICATED DOUBLER & TRIPLER, PICKED UP HOLES & COUNTERSUNK HOLES IAW SRM 53-60-01-2R-3, STEP E- I. STEPS E - I (FILLER). COMPLETED FABRICATION OF REPAIR PARTS IAW SRM 53-60-01-2R-3, STEPS E THROUGH I. ALODINED, & APPLIED BMS 10-79, TYPE III PRIMER IAW SRM 53-60-01-2R-3, STEPS J, K & M. INSTALLED COUNTERSINK REPAIR WASHERS WITH BMS 5-95 ADHESIVE IAW SRM 53-60-01