What was found
AIRCRAFT WAS GROUNDED: AFTER TAKEOFF FLIGHT ATTENDANTS NOTED A BURNING SMELL IN THE CABIN AS THE ECAM GAVE US A LANDING GEAR, CONTROL INTERFACE UNIT 1 FAULT. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO MIA WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE ACCOMPLISHED CABIN ODOR TROUBLESHOOTING TASK CARD 26L00021001AND FOUND NO BURNING RUBBER SMELL. MAINTENANCE ACCOMPLISHED TSM 32-31-00 AND FOUND THE #1 LANDING GEAR CONTROL INTERFACE UNIT (LGCIU) FAULTY AND REPLACED IT PER AMM 32-31-71. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.