What was found
STRINGER 21 LEFT CORREDED BETWEEN FS 310.00 TO FS 319.00. GROUNDING POINTS ON FRAME GS 405 AND GS 445 ARE ALSO CORRODED. (C-CHECK RO 4/20/2021) REMOVED AND REPLACED CORRODED INTERCOSTAL AT STR21L FROM FS 310 TO FS333 IAW CRJ700 SRM 53-21-23, 51-42-06,51-42-20, 51-40-11, 51-24-16,51-24-21 AND 51-24-36.