As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING POSITION SENSOR INSTALLATION ON THE CONTROL COLUMN, DAMAGE WAS FOUND ON THE BS 120 FLOORBEAM WEB. TWO HORIZONTAL CRACKS IN THE WEB. REPAIR WAS MADE BY TRIMMING THE WEB TO REMOVE THE CRACKS, PERFORMING A HFEC TO ENSURE DAMAGE REMOVAL AND FABRICATING AND INSTALLING REPAIR PARTS AS CALLED OUT IN EAC ECRA N835F-53-MD81-005.