What was found
FRAME AT FS310 CORRODED BETWEEN STGR20R AND STGR21R. (C-CHECK) RO 2/1/2021 REMOVED DAMAGED FRAME AND INSTALLED NEW SERVICEABLE FRAME AT FS 310 BETWEEN STGR20R AND STGR21R IAW CRJ-200 SRM 51-42-06, 51-40-11 AND 51-42-21 REV 38 DATED 10 JULY 2019 AND COMPLIED WITH SKYWEST CARD 51-900-1003-SKY. 337 ATTACHED. PART FOR PART REPLACEMENT, . REFERENCED DRAWING 601R32002 FOR FASTENER CALL OUT. NO WEIGHT CHANGE PART FOR PART REPLACEMENT.