What was found
FLOOR STRUCTURE AT FS.574+10 TO FS.605+5, LBL 27 HAS CORROSION AT NUT-PLATE LOCATION. AIRCRAFT REMOVED FROM SERVICE. BLENDED CORROSION AT FLOOR STRUCTURE AT FS.574+10 TO FS.605+5, LBL 27, P(1) 2.1Ï¿½ L X 0.8Ï¿½ W X .009Ï¿½ X .009Ï¿½ D, P(2) 2.1Ï¿½ L X 0.8Ï¿½ W X .009Ï¿½ X .009Ï¿½ D, P(3) 2.1Ï¿½ L X 0.8Ï¿½ W X .009Ï¿½ X .009Ï¿½ D, P(4) 2.1Ï¿½ L X 0.8Ï¿½ W X .009Ï¿½ X .009Ï¿½ D, REF CRJ-200 SRM 51-21-06. DEPTH GAUGE # X102407 CAL DUE: 10-07-2021. PERFORMED HFEC INSPECTION ON BLENDED AREA, (4EA) LOCATIONS, OF FLOOR STRUCTURE AT FS.574+10 TO FS.605+5, LBL 27 REF EA# AWAC-CRJ253-01652 DATE OF ISSUE: 01-31-2021, REV(IR) AND CRJ-200 PART (1) NDTM 51-20-06, REV (42). NO INDICATION NOTED. ET TESTER S/N: 60007150515 CAL DUE: 10-09-2021. PERFORMED UT THICKNESS MEASUREMENT ON BLENDED AREA, (4EA) LOCATIONS, OF FLOOR STRUCTURE AT FS.574+10 TO FS.605+5, LBL 27, MINIMUM REMAINING THICKNESS 0.038Ï¿½ REF EA# AWAC-CRJ253-01652 DATE OF ISSUE: 01-31-2021, REV(IR) AND CRJ-200 PART (4) NDTM 51-00-001, REV (42). UT GAUGE S/N: 151136107 CAL DUE: 09-16-2021. EVALUATED BLENDS AND FOUND TO BE WITHIN ALLOWABLE LIMITS REF EA# AWAC-CRJ253-01652 DATE OF ISSUE: 01-31-2021, REV(IR). RESTORED PROTECTIVE FINISH TO BLENDED AREA, (4EA) LOCATIONS, OF FLOOR STRUCTURE AT FS.574+10 TO FS.605+5, LBL 27 REF EA# AWAC-CRJ253-01652 DATE OF ISSUE: 01-31-2021, REV(IR).