As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CHANNEL- CORROSION LOCATION: FLOOR SUPPORT CHANNEL LOCATED FROM STA 1500-1640 RBL 12.25 POS: AFT REMOVED FLOOR SUPPORT CHANNEL BEGAN DRILLING HOLES ON FLOOR SUPPORT CHANNEL. OK TO INSTALL FLOOR SUPPORT FINISH INSTALLATION OF FLOOR SUPPORT CHANNEL PER BAC DWG 146N5390.