What was found
LEFT HAND WING AFT CHANNEL AT WS 53.60 HAS POSSIBLE CORROSION AROUND UPPER LIGHTNING HOLE. AIRCRAFT REMOVED FROM SERVICE. REMOVED CORROSION AT LT WS.53.60, REF CRJ200 SRM 51-21-06, (REV 38). REWORKED AREA MEASURES 1.7L X 1.0W, 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 53.60 MINIMUM THICKNESS 0.047, REF EA: AWAC-CRJ253-01345 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 53.60, REF EA: AWAC-CRJ253-01345 DATE OF ISSUE: 1-18-2021, (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. RESTORE SURFACE FINISH ON REWORKED AREA, REF EA: AWAC-CRJ253-01345 DATE OF ISSUE: 1-18-2021, (REV A).