What was found
FUSELAGE EXTERNAL SKIN IS CRACKED AROUND 6 FASTENERS ON FR 77 BETWEEN STR 4L-7L. CUTOUT TWO DAMAGED AREAS ON EXTERNAL SKIN ON FRAME 77, IAW EMB 145 SRM 53-32-01. INSTALLED 2 BUSHINGS ON EXTERNAL SKIN ON FRAME 77 BETWEEN STRINGERS 5L-7L, IAW EMB 145 SRM 53-32-01, ETD2020-145-035446A AND PIEDMONT EO1-53-20-0455 REV A.