What was found
L. HAND LOWER WING PLANK ACCESS PANEL 540BB HAS FRETTING CORROSION. AIRCRAFT REMOVED FROM SERVICE. REMOVED CORROSION AT LOWER WING PLANK ACCESS AT PANEL 540BB REF. CRJ200 SRM 51-21-06, REV.38. PERFORMED UT THICKESS MEASUREMENT, MINIMUM REMAINING THICKNESS OF PLANK CIRCUMFERENCE 0.179Ï¿½, REF. EA# AWAC-CRJ257-01575 REV.(IR) DATED: 02-17-2021 AND CRJ 200 NDTM PART (4) 51-00-001. UT GAUGE S/N 151136107 CAL DUE: 09-16-2021. PERFORMED HFEC INSPECTION ON WING PLANK ACCESS AT PANEL 540BB REF. REF. EA# AWAC-CRJ257-01575 REV.(IR) DATED: 02-17-2021 AND CRJ 200 NDTM PART (1) 51-20-06, REV (42). NO INDICATION NOTED. ET TESTER S/N: 60007150515 CAL DUE: 10-09-2021. ROTO PEENED LOWER WING PLANK ACCESS AT PANEL 540BB REF. EA# AWAC-CRJ257-01575 REV.(IR) DATED: 02-17-2021. APPLIED SURFACE PROTECTION ON LOWER WING PLANK ACCESS AT PANEL 540BB REF. CRJ 200 SRM 51-25-06, REV. 38. BONDING CHECK GOOD REF. CRJ 200 AMM 51-80-00. LEAK CHECK GOOD REF. CRJ 200 AMM 28-11-00-780-802.