What was found
NUT PLATE HOLE IN FUSELAGE SKIN AND UNDERLINING DOUBLER AT STR 19R AND FS 409+93 OBLONG/ELONGATED TO 0.297W X 0.294. AIRCRAFT REMOVED FROM SERVICE. OPENED HOLE IN STR 19R TO 0.2055, REF REO 601R-53-31-1145 DATED 2020-10-05. OPENED ELONGATED HOLE IN FUSELAGE SKIN AND UNDERLING DOUBLER TO 0.320 L X 0.304 W, REF REO 601R-53-31-1145 DATED 2020-10-05. PERFORMED HFEC INSPECTION ON REWORKED AREA BETWEEN FS 409+80-FS 409+96 AND STR 19R. EXTERNAL AND INTERNAL SURFACES, IAW REO 601R-53-31-1145 DATED 2020-10-05 AND CRJ 200 NDTM PART 1 REV 41 PROCEDURE 51-20-06. NO INDICATIONS NOTED. COMPLIED WITH REO 601R-53-31-1145 DATED 2020-10-05.