As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A NR 1 ENGINE INLET AND FAN BLADES DETAILED INSPECTION. CORROSION FOUND ON 17 NUT PLATES FOR THE AFT ACOUSTICAL PANELS FROM APPROX 1:30 TO 10:30 O'CLOCK POSITIONS. AROUND BOTTOM OTBD SIDE OF CASE. ALSO FOUND THE NR 5 FAN FRAME AT 5 O'CLOCK POSITION HAS LOWER AFT FASTENER INSERT DEBONDED FROM PANEL. ACFT GROUNDED. REMOVED AND REPLACED THE NR 1 ENGINE IAW T/C 78471000, AND 78471001.