As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FRAME AT FS319.70 STRINGER18L TO 21L IS CORRODED. (C-CHECK RO 10/30/2021) REMOVED AND INSTALLED NEW FRAME AT FS319.70 LZH BETWEEN STGR 18L TO 21L REF CRJ700 SRM 51-42-06-001-001-A01, CRJ700 SRM 51-42-21-001-001-A01, AND DWG SH670-31810 REV-Y. COMPLIED WITH TASK CARD 51-900-1002-SKY. PRESSURE CHECK GOOD,