What was found
L/H AILERON INBD AND OTBD PCU ATTACH POINT HDWR HAS CORRODED COTTER PINS (C-CHECK RO 12-4-2021) REMOVED 2 EACH RUSTED COTTER PINS AND INSTALLED 2 EACH NEW COTTER PINS AT THE LH AILERON INBD/OTBD PCU ATTACH POINT HARDWARE. REF - CRJ 200 AMM 20-24-00-910-801. PERFORMED AN OPERATIONAL TEST OF THE AILERON CONTROL SYSTEM. REF - CRJ 200 AMM 27-11-00-710-801. OPERATIONAL TEST GOOD. NO DEFECTS NOTED.