What was found
VACUUM WASTE EXHAUST PORT ON LT SIDE ABOUT 11 INCHES FWD OF STA 927 HAS EVDIENCE OF CORROSION ON AIRCRAFT SKIN JUST BELOW HOLE. GROUNDED - YES. REMOVED DAMAGE AND CHECKED LIMITS ORIGINAL MAT .125, MAT. REMOVED .005, REMAINING MAT.120 FOUND TO BE WITHIN LIMITS IAW B737-9 SRM 53-70-01-0I-1, SRM 53-00-01-1A-1. APPLIED ALODINE IAW B737-MAX9 SRM 51-20-01. APPLIED PRIMER IAW BOEING SOPM 20-44-04. APPLIED TOPCOAT IAW AMM 51-21-99/701.