What was found
SHORTLY AFTER APU START FOR DEPARTURE, CREW NOTED SMOKE IN CABIN AS WELL AS SEVERAL CBS POPPED (GND SVC R BUS, R BATT CHARGER, TOILET SYS PWR, FWD TOILET PWR, AFT TOILET PWR, TOILET BLOWER, TOILET LINE HEATER AND TOILET HTR BLANKET). CREW SHUTDOWN A/C AND REPORTED ISSUE. GAINED ACCESS AND INSPECTED VARIOUS SUSPECTED COMPONENTS, FOUND CONNECTORS LOCATED IN FWD R/H CABIN UNDER FLOORBOARDS 2000P/J32 BURNT. AIRCRAFT OPERATOR AND AIRCRAFT MANUFACTURER CONTACTED AND PROVIDED INITIAL FINDINGS. WORK ORDER CS734820.1.1.