What was found
RIGHT HAND WING AFT CHANNEL AT WS 48.30 HAS POSSIBLE CORROSION ON INBOARD SURFACE. AIRCRAFT REMOVED FROM SERVICE. REMOVED NUTPLATE AT WS 48.30, REF CRJ200 SRM 51-45-00, (REV 38). REMOVED CORROSION AT (2 EA) LOCATIONS ON CHANNEL AT WS 48.30, REF CRJ200 SRM 51-21-06, (REV 38). REWORKED AREA MEASURES P(1) 1.67L X 0.71W, P(2) 2.14L X1.61W, REF CRJ200 SRM 51-21-06, (REV 38). CALIPER S/N:61512501 CAL DUE:08-07-2021. PERFORMED UT THICKNESS MEASUREMENT ON BLENDED AREA OF RT WING AFT SPAR AT WS 48.30 P(1) 0.0494, (P)2 0.0474 REF EA: AWAC-CRJ253-01555 DATE OF ISSUE: 01-18-2021, (REV A) AND CRJ200 PART(1) NDTM 51-00-001, (REV 42). UT TESTER S/N: DBT-CT-1033 CAL DUE: 02-19-2021. PERFORMED HFEC ON BLENDED AREA OF RT WING AFT SPAR AT WS 48.30 P(1) AND P(2), REF EA: AWAC- CRJ253-01555 DATE OF ISSUE: 01-18-2021, (REV A) AND CRJ200 PART(1) NDTM 51-20-06, (REV 42). NO INDICATION NOTED. ET TESTER S/N:200051301 CAL DUE: 01-24-2021. INSTALLED NUTPLATE AT WS 48.30, REF CRJ200 SRM 51-45-00, (REV 38). RESTORE SURFACE FINISH ON REWORKED AREA, REF EA: AWAC- CRJ253-01555 DATE OF ISSUE: 1-18-2021, (REV 38).