As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
* THE DECOMPRESSION PANEL ON LH FLOOR SILL BETWEEN FS453.00 AND FS469.00 HAS CORROSION AND IS BLOWN OUT. (MARKED) (C-CHECK) RO 5/16/2020 REMOVED AND REPLACED WITH NEW - THE DIAPHAGM ASSY/DECOMPRESSION PANEL, LOCATED ON THE LH FLOOR SILL AT FS453.00 THRU FS469.00. REF CRJ900 AMM.