Abstract: Systems and methods for detecting and locating leaks in internal pressure vessels. A method generally includes forming a pressurizing cavity external to and adjacent an internal pressure vessel. A pressurized fluid is injected into the pressurizing cavity to cause pressurized fluid to flow from the pressurizing cavity through a leak into the internal pressure vessel. The internal pressure vessel is monitored to detect leakage of pressurized fluid into the internal pressure vessel.

Abstract: A test apparatus for determining the operable condition of fuel level conl valves is presented. A sensor is connected to a fuel line for delivery of a test sample of fuel through the fuel line to a receiving system from a fuel supply source. At least one valve is disposed in the fuel line between the sensor and the fuel receiving system. A plurality of sense lines is connected from the sensor to a flow indicator and a pressure indicator such that simultaneous indication of the visual flow indicator and the visual pressure indicator within respective predetermined limits upon a delivery of the test sample of the fuel prior to delivery of the fuel through the fuel line indicates that the fuel level control valve is not properly operable.