Trevose was dispatched to Falls Ave for a dwelling fire with Station 6 LSFD around 2034 hrs. Chief 6 first on scene with smoke showing. Engine 84 was the first apparatus on scene and went into service with hand tools and pw's. Engine company opened up the wall to find fire running the interior wall and extinguished with a 1 3/4 hose-line. Companies on scene were E84, E4, E4-1, R6, R2, SS6, SS84, L1 and Canteen 4. E84 and R6 stayed on scene to help asst FM 243. Fire is still under-investigation.