What was found
CORROSION; AFT CARGO DOORWAY SUB THRESHOLD IB CHORD; LWR NUTPLATE RETAINER STRIP BS 794.5 + 1 RBL 19. EVALUATED CORROSION; FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS IN THE SRM AND REQUIRES REPLACEMENT IAW SRM 51-10-02-0G-0. REMOVED SUB THRESHOLD IB CHORD; LOWER NUTPLATE RETAINER STRIP IAW SRM 51-40-02-0G-0. LOCATED; DRILLED; DEBURRED NEW NUTPLATE RETAINER IAW SRM 51-40-05-0G-0, DWG 146A8340. INSTALLED NEW NUTPLATE RETAINER IAW SRM 51-40-02-0G-0, DWG 146A8340. INSTALLED NEW NUTPLATE RETAINER IAW SRM 51-40-02-0G-0, DWG 146A8340.