What was found
(CAN) AILERON FAIL (C) POSTED IN-FLIGHT AILERON FAIL EICAS CAUTION MESSAGE GOT POSTED, QUICK REFERENCE HANDBOOK PROCEDURE WAS FOLLOWED AND THE AIRCRAFT DIVERTED. AIRCRAFT WAS DECLARED AOG. ONBOARD MAINTENANCE SYSTEM SHOWED FAULT CODE 2715F0006 - LEFT AILERON SURFACE OSCILLATORY FAULT/REPORTED BY PFCC AFTER A POWER RESET, THE TECHNICIANS REPORTED NORMAL OPERATION OF THE AILERON. LEFT OUTBOARD AILERON ACTUATOR WAS REPLACED AND AIRCRAFT RETURNED IN SERVICE. (TC# 20190805005)