At 0113 hours early Tuesday morning, Units were dispatched to Mystic Ct. for a townhouse fire, reported to be a deck on fire at the townhouse behind Mystic Ct. Wagon 503 (OIC-Sgt Davis, D/O-Darrah, FF-Thompson, RH's-Miller, Uffelman, Hewlett) marked on scene at the end of Mystic Ct with a working deck fire. W503 quickly extinguished the fire with a 1 3/4 while W512 pulled a back up line and T514 checked the house for extension. Once the fire was extinguished, BC507 (Chief Young) held W503, W512 and T514 while we overhauled and waited for the FM. OWL's units assisted us with re-racking the second line and went in service while W503 and BC507 waited for the FM. Once the FM completed his investigation, W503 was able to clear at 0208 Hours.