At ~10:22 PM, Westmoreland 911 dispatched Station 20 (Murrysville VFC) for an Automatic Fire Alarm (AFA) at Redstone Highlands on Cline Hollow Road. Station 20 responded with Truck 20 (6 firefighters including Assistant Chief 20, Captain 20, Sergeant 20), Engine 20 (6 firefighters), Rescue 20 (5 firefighters) with 1 firefighter going directly to the scene. Westmoreland 911 also dispatched the following additional stations to support Station 20: Station 64 (White Valley VFC), Station 22 (Export VFC), Station 78 (Sardis VFC), Station 87 Harrison City VFC), and Station 610 (Murrysville Medic One). Engine 64 was first on scene, with Chief 64 establishing the command. Upon entry of the structure, it was found that a small leak in the dry side of the sprinkler system had activated the structure's AFA System. The call was held to Stations 20, 22, and 64, and all other stations were returned. The firefighters temporarily fixed the affected section of the structure's sprinkler system, and the scene was turned over to the facility maintenance department for final repair and system reset. Command 20 returned all on scene units. Engine 20, Rescue 20, and Truck 20 returned to service and station.