On Tuesday, December 2nd, at approximately 5:20 PM, the Monroe Fire Dept. was dispatched to a reported Working Trailer fire on Dinev Ct. First arriving Chief found a mobile trailer fully involved. The trailer was being used as a residence by people working in the area. Engine 543 utilized an 1 3/4" line to extinguish the fire. Orange County Fire Investigators FI 6 and FI 16 assisted with the cause determination investigation. Monroe units were back in service by 7:20PM.