Abstract: A fuel leak detector for an aircraft system is shown as comprising a plurality of potential fuel leak sources where leaking fules are routed to a collector through a leak detector associated only with only one of the potential leak sources and the fule leak collector. Each detector permits the flow of leaking fuel into the collector, while at the same time maintaining a visual or other type of indication of the location of the fuel leak. Each detector comprises a small, light weight container which traps up to a predetermined amount of any fluid flowing through it. The level of the trapped fluid is indicated by a float. Fluid in excess of the predetermined amount flows through the container trap and into the collector. The contents of the collector are tested for fuel, and if fuel is detected, the maintenance personnel then search the individual traps for a visual indication of the location of the fuel leak.