What was found
AIRCRAFT WAS GROUNDED. FLIGHT CREW REPORTED ON FINAL APPROACH RECIEIVNG A GEAR DOOR MESSAGE AND AFTER LANDING ENCOUNTERED A STEERING FAULT RESULTING IN THE AIRCRAFT BEING TOWED OFF THE RUNWAY TO THE GATE. MAINTENANCE REPORTED THE LANDING GEAR DOORS NOT CLOSED, BOTH MAIN GEAR LEVER DOORS AND NOSE GEAR DOORS REMAINED OPENED. REPLACED #2 LANDING GEAR CONTROL AND INTERFACE UNIT PER AMM 32-31-71 (AALA202006169008) AND 62GA RELAY PER AMM 32-31-08 (AALA202006179013).