As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON REMOVAL OF LH AILERON BEARINGS FOUND SEVERE PITTING AND EXCESSIVE CHAMFER IN BORES OF CTR HINGES (C-CHECK) RO:12/14/2019 FOUND PITTING AND CHAMFER OUT OF LIMITS IAW BOMBA CMM. RECEIVED SERVICEABLE AILERON, INSTALL C/W ON CP#19750641 W/O 1017863 5000 0006 SN 7442029 TAG BB4839.