As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*HARDWARE SECURING HINGE BOLT RETAINERS FOR R/H AILERON ARE CORRODED. (ALL THREE HINGE LOCATIONS) (C-CHECK RO 5/20/2021) REMOVED CORRODED HINGE BOLT RETAINERS FOR R/H AILERON AND REPLACED WITH NEW HINGE RETAINER HARDWARE REF CRJ200 AMM 27-15-01-000-801 REF CRJ200 AMM 27-15-01-400-801