Ladder 65 was dispatched on Box 87-17 at 1100hrs along with Bucks Tanker 58 and Engine 57 to assist Station 71 on a dwelling fire.  Chief 65 (Seip) arrived to find a 2 story SFD with an active chimney fire.  Sqrt and Deputy 71 Kulp) arrived, sent crews interior and Ladder 65 arrived and set the main ladder to the roof.  Bucks Chief 57 (Young) was assigned manpower. Crews worked for about an hour contatining the fire to the wodd burning stove. Crews also used the Thermal Cmaera to check the remainder of the home for any extension.  Fire Police directed traffic around the scene.  All units were returned to service in about 90 minutes.