Station 5 was dispatched on Saturday evening @ 1914 hrs for a dwelling fire in Strasburg Twp. Additional reports were that there was a possible fire in the wall. Chief 5 arrived on scene to find a (2) story residential structure and what appeared to be normal conditions. Truck 5 was directed to the roof/chimney area. Engine 57-4 (Quarryville) was directed to investigate the 1st floor living area and Engine 51-1 (Bart) was directed to the 2nd floor and attic area. Crews found a small fire in the 1st floor joist area where a chase was located for a chimney liner. The incident was under control @ 1956 hrs and the remaining units went available @ 2032 hrs.