Truck 1 was dispatched as second due truck to 5019 54th ave in Co.9's area at 2058 hours. Company 9 found fire showing from the second floor of a two story single family dwelling. Truck 1 arrived and was directed to division two to work with the engine companies from 9. The truck crew searched, ventilated and opened up on division two. Multiple ground ladders were thrown by the truck driver and tillerman. Truck 1 and Co.9 were held for investigators for extended period of time and the truck returned to quarters at about 0010 hours.