What was found
SHORTLY AFTER TAKEOFF, THE CREW REPORTED A LT FADEC MAJOR CAS MESSAGE. MX REQUESTED THE PERFORMED AN AIR-TURN-BACK, BECAUSE OF PRIOR HISTORY (LISTED BELOW). MX REPLACED TWO RELAYS AND SCHEDULED A TEST FLIGHT. AFTER THE TEST FLIGHT, HAD NO DISCREPANCIES THE AC WAS RETURNED TO SERVICE. LT FADEC FAULT: MX FOUND FAULT CODE (5A) BUT COULD NOT DUPLICATE THE PROBLEM. WITH MX CONSULT THE MESSAGE CLEARED ON GROUND. MX REPLACED THE LT EEC FOR TROUBLE SHOOTING AND REINITIALIZED.