What was found
CORROSION ON FLOOR SILL RH AT FS353 RBL41, FS359 RBL41 AND FS384 RBL41 AROUND NUTPLATE HOLES. ***AIRCRAFT REMOVED FROM SERVICE*** BLENDED CORROSION ON RH FLOOR SILL AT FS353 RBL41, FS359 RBL41 AND FS384 RBL41 AROUND NUTPLATE HOLES. P/N 601R31148. CORROSION DIMENSION WAS L = 3.40Ï¿½ X W = 1.85Ï¿½ X D = 0.007Ï¿½. FLOOR SILL ORIGINAL THICKNESS 0.063Ï¿½ AND REMAINING THICKNESS 0.056Ï¿½. PERFORMED HFEC WITH NO INDICATIONS. RESTORED PROTECTIVE FINISH. ALL WORK WITHIN LIMITS WAS PERFORMED IAW ASAP EA # AWAC-CRJ253-01674 REV A DATED 9/1/2021.