What was found
AT CRUISE RECEIVED CARGO SMOKE DETECTOR ECAM FAULT. F/A CHECKED LAV`S FOR SMOKE, SMELLED BURNING PLASTIC IN FWD LAV, BUT NO SMOKE WAS PRESENT. DIVERTED TO ABQ. MX FOUND LOWER ECAM HAD INFO SDCU NR 2 INOP, MESSAGE CLEARED. TROUBLESHOT SYSTEM USING TSM 26-17-00-810-802 (SDCU SINGLE CHANNEL FAULT): NO DEFECTS NOTED. INSPECTED FWD LAV O2 CONTAINER, FIRE BOTTLE, TEMP STRIP, HOT WATER HEATER, AND LIGHTS, FOUND NO SIGNS OF FIRE OR MELTED PLASTIC. MX FERRIED BACK TO PHX, AND A FUP WAS WRITTEN TO REPLACE ALL CARGO & LAV SMOKE DETECTORS. REPLACED 3 EACH LAVATORY SMOKE DETECTORS IAW 26-17-00, & 6 EACH CARGO SMOKE DETECTORS.