Just after 0600 hours, the assignment was dispatched for the 4000 blk of Song Bird Lane (wolf town) in the 7-07 box. Engine 72 arrived and laid a 3-inch line and found a 1 story single family with fire throughout. The engine crew stretched a 200’ 1-3/4 attack line to the front door and began a defensive attack at first. Once a water supply was established crews transitioned to an aggressive interior attack, conditions deteriorated and crews from Engine 72, Engine 21 and Tower 2 backed out and regrouped with new attack plan. A mayday was called and cleared in 34 seconds after a member of tower 2 fell into the crawl space and was pulled out by the OIC of Engine 72. The fire was under control in approximately 40 minutes. Units operated until 08:35