What was found
RIGHT WING AFT SPAR - AFT LOWER WING PLANK, DIRECTLY BELOW REAR LOWER SPLICE JOINT @ BL 45, SHOWS EVIDENCE OF CHAFFING AND IMPACT DAMAGE AS MARKED / 57-610-600 (C-CHECK) RO 2/25/2021 REMOVED CHAFING DAMAGE TO WING PLANK TO A SMOOTH FINISH.C/W NDT INSPECTION REF CRJ200 / NDTM 51-20-06 & 51-20-04. NO DEFECTS NOTED. / TUC9452 CAL DUE 31-AUG-2021. MINIMUM / THICKNESS RANGE MEASURED = .297" - .354". ALL READINGS MARKED ON PART. TUC6962 CAL DUE 30-SEP-2021. SEE ATTACHED NDT-9 & NDT-10 REPORTS. / ROTO PEENED REWORKED AREA / . RESTORED TO ORIGINAL FINISH A023 (3 LAYERS) AND. APPLIED SELF-CONTOURING SEALING PAD BTWN FAIRING AND LWR / WING PLANK. PER REO 601R-57-21-880 REV D 2017-03-06. C/W 51-900-1003-SKY