What was found
REF T/C #78472000 #1 ENG INLET AND FAN BLADES- DETAILED INSPECTION. FOUND 10 EACH NUT PLATES ON O/B FAN FRAME CASE THAT HAVE CORROSION UNDER THEM THAT IS ON THE FAN FRAME CASE. ALL LOCATIONS ARE FOR THE FWD FASTENERS OF THE AFT O/B ACOUSTICAL PANELS. 1 EA #4 PANEL, 3 EA #5 PANEL, 2 EA #9 PANEL, 3 EA #10 PANEL, 1 EA #11 PANEL. NO CRACKS FOUND IN FAN FRAME CASE. GROUNDED - YES. REMOVED NUTPLATE ON #1 ENGINE FAN FRAME CASE @ 11 O'CLOCK POS. REF B737-900 SRM 54-40-02. CORROSION FOUND AT THIS LOCATION ON FAN FRAME CASE, NOT ALLOWED AT THIS LOCATION PER B737-900 AMM 72-23-05-700-801-F00. REMOVED #1 ENGINE ESN # 862-676 FOR OFF WING NUT PLATES REPAIR. REF W/O # 1954058 T/C # 78471000. DEFECT TRANSFERRED TO SHOP W/O # 1955856.