As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCESSING FOR REPAIR OF LT FS280 LOWER WEB, FOUND THE LT BS 280 FLOORBEAM TO HAVE DEEP PITTING CORROSION WITH THE DEEPEST DAMAGE BEING .048 AT LBL12 WHICH IS OUT OF LIMITS IAW CRJ-700 SRM 53-00-00-101-001-A01. LT BS 280 FLOORBEAM REQUIRES REPLACEMENT.