Ladder 65 and Engine 65 were dispatched along with Sqt 71, E87, SD 78 to assist Station 42 on a dwelling fire on Walnut Street in Green Lane Borough.  Chief 42 arrived to find an active chimney fire in a SFD.  E42 and Sqrt 71 arrived and were put in service.  Ladder 65 arrived and assisted with roof operations and interior.  Crews raised an additional ladder to side B and assisted with debris removal in the wood stove in the basement.  Crews were in service for about an hour.  Fire Police directed traffic around the scene.