As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERCOSTAL AT STRG20L CORRODED BETWEEN FS333 AND FS349. (C-CHECK) RO 2/1/2021 REMOVED AND REPLACED INTERCOSTALAT STR21L BETWEEN FS333 AND FS349 IAW CRJ 200 SRM 51-42-06 AND 51-42-21. REFER TO CONTINUATION CARD FOR ALL MAINTAINENCE PERFORMED. AND COMPLIED WITH SKYWEST CARD 51-900-1003-SKY. 337 ATTACHED. PART FOR PART REPLACEMENT, NO WEIGHT CHANGE. REFERENCED DRAWING 601R31527 FOR FASTENER CALL OUT