Patent ID: 8423313

Claim:
A method of testing a valve control system in a fuel supply system in an aircraft, the fuel supply system having a plurality of control valves, wherein the control system includes relay means for outputting control signals to each of the plurality of control valves, each of the plurality of control valves being adapted to be operated independently by two or more actuator motors, and the relay means being adapted to output the control signals to each actuator motor of the plurality of control valves, the method comprising the steps of: providing connector means for electrically connecting a test device to the control system relay means, connecting a test device to the relay means such that the test device is adapted to receive control signals output by the control system to any one or more of the plurality of control valves, detecting a control signal output from the relay means to one of the plurality of control valves, and identifying the particular one of the plurality of control valves to which a detected control signal is output by the relay means and/or identifying the nature of the control signal output to that particular control valve, characterized in that the connector means electrically communicates with individual circuits of the test device for receiving particular control signals for the particular valve actuator motors of the particular control valve, and in that the method further comprises the step of identifying the particular one of the actuator motors of the particular control valve to which a detected control signal is output by the relay means.