As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
* CORROSION DETECTED ON CRAWLWAY FLOOR "SUPPORT" ANGLE, ON AFT SIDE OF F.S. 280.00 BETWEEN STGR 26L AND 26R, AROUND NUT PLATE HOLES (MARKED). (C-CHECK RO 5/25/2021) REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS IAW CRJ-900 SRM 53-11-10-001-003-A01. INSTALLED NEW SUPPORT ANGLE ON FS280.00 IAW CRJ-900 SRM 51-42-06-001-001-A01, CRJ-900 SRM51-42-21-001-001-A01 AND CRJ-900 SRM 51-42-001-001-A01