What was found
BTV - FLT 3689 - DURING CLIMB-OUT, AUTOPILOT KICKED OFF AND RECEIVED STICK SHAKER AND OVERSPEED WARNING. COULD NOT TRIM TO LEFT AND ACFT TRIMMED BY ITSELF TO THE RT. COULD NOT RE-TRIM TO LT WITH ONE-HALF AILERON TRIM TO RT. ACFT RETURNED TO BTV AND LANDED UNEVENTFULLY. FOUND FLT GUIDANCE CONTROLLER FAULTING. REMOVED AND REPLACED FGC IAW 22-16-81. OPS CHECKED GOOD. EWR - FLT 4211 - AFTER TAKEOFF, CREW NOTED SAME PROBLEM PLUS THE SMELL OF ELECTRICAL SMOKE ON LANDING WHILE RETURNING TO EWR. REMOVED AND REPLACED FGC IAW ATR 42 MM 22-16-81, OPS CHECKED GOOD ON GROUND. ALL OTHER DISCREPANCIES WERE FOUND OPERATING NORMALLY. ACFT RELEASED FOR TEST FLIGHT. NO FLIGHT DISCREPANCIES NOTED AND ACFT RELEASED TO