As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE RH AILERON CENTER HINGE ASSEMBLY WAS DISCOVERED TO HAVE TOOL MARKS DURING THE REMOVAL OF THE PCU ATTACH LINK BOLT AT AS343.53. PERFORMED PERMANANT REPAIR IAW CRJ700/900 ILLUSTRATED PARTS CATALOG {IPC) 57-60-00, FIGURE 1, ITEM 146 (REV.37 DATED AUG. 15, 2019).