As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LBL & RBL 24 LONGITUDINAL OVERWING FLOORBEAMS WERE PREVIOUSLY MODIFIED PER REV B OF 3-56673-12AD, HOWEVER THIS INSTALLATION DOES NOT MEET THE REQUIREMENTS OF AD 2001-17-18. FLOORBEAM WEBS WERE FOUND CRACKED. FLOORBEAM C-CHANNELS WERE REPLACED WITH AD COMPLIANT CHANNELS AND FLOOR BEAM WEBS WERE REPAIRED WITH A DOUBLER.