What was found
LOWER EXTERIOR FUSELAGE, STA 887, LBL40-RBL40, LOWER SKIN IS CORRODED ON AFT SIDE OF BUTT SPLICE.DOT: N077TIPR833K. GROUNDED - YES. REMOVED CORROSION AT LOWER SKIN ATA STA 887 BUTT SPLICE, ORIG THICKNESS 0.080" WITH 0.003" REMOVED, 0.077" REMAINING THICKNESS FOUND TO BE WITHIN LIMITS IAW B737-800 SRM 53-00-01-1A-5. RESTORED SURFACE FINISH IAW B737-800 SRM 53-00-01-1A-5, AND B737-800 AMM 51-21-72.T#:T8224CDOT REMOVED.