As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"STGR20R INTERCOSTAL IS CORRODED BETWEEN FS319 AND FS333. REMOVED INTERCOSTAL P/N SH670-32004-1 AT STR20R BETWEEN FS319 TO FS 349 IAW CRJ900 SRM 51-42-06-001-001-A01. INSTALLED NEW INTERCOSTAL P/N SH670-32004-1 AT STR20R BETWEEN FS 319-FS349 IAW CRJ900 SRM 51-40-11-001-001-A01, 51-42-06-001-001-A01 AND 51-42-21-001-001-A01. "