Abstract: The present invention relates to a tester (100) for testing operational reliability of a cockpit oxygen distribution circuit (1) having a plurality of components (20, 30, 40, 50) ensuring supply of oxygen from the cockpit oxygen distribution circuit (1) to a cockpit crew of an aircraft in an emergency situation. The tester (100) comprises means (20?, 30?, 40?, 500 for electrically connecting the tester (100), in place of at least one of the components (20, 30, 40, 50), to the cockpit oxygen distribution circuit (1), an indicator (120) for indicating that the electrical connection of the tester (100) to the cockpit oxygen distribution circuit (1) has been established in a predefined manner, and switching means (RL1, RL2, RL3, RL4) for initiating an output signal of the tester (100), wherein the output signal is indicative of an operating condition of the component (20, 30, 40, 50) when being connected to the cockpit oxygen distribution circuit (1).

Abstract: The present invention relates to a method for testing power lines and signal lines onboard of an aircraft, wherein the power lines and signal lines normally connect a 3-phase AC motor with the power supply system of the aircraft, and wherein the 3-phase AC motor has separate input terminals onto which, during operation of the 3-phase AC motor onboard of the aircraft, predetermined voltages of predetermined phase difference are to be applied. The method according to the invention comprises the steps of connecting the power lines and signal lines with input terminals (24) of a testing equipment (1), in place of the 3-phase AC motor; applying voltages on the power lines and signal lines; conducting a voltage test, and simultaneously with the voltage test, a phase test by the testing equipment (1) in respect of whether the voltages and the phase difference of the voltages applied to the power lines and signal lines is equal to the predetermined voltages and the predetermined phase difference.

Abstract: The present invention relates to a tester (100) for testing operational reliability of a cockpit oxygen distribution circuit (1) having a plurality of components (20, 30, 40, 50) ensuring supply of oxygen from the cockpit oxygen distribution circuit (1) to a cockpit crew of an aircraft in an emergency situation. The tester (100) comprises means (20?, 30?, 40?, 500 for electrically connecting the tester (100), in place of at least one of the components (20, 30, 40, 50), to the cockpit oxygen distribution circuit (1), an indicator (120) for indicating that the electrical connection of the tester (100) to the cockpit oxygen distribution circuit (1) has been established in a predefined manner, and switching means (RL1, RL2, RL3, RL4) for initiating an output signal of the tester (100), wherein the output signal is indicative of an operating condition of the component (20, 30, 40, 50) when being connected to the cockpit oxygen distribution circuit (1).

Abstract: The present invention relates to a method for testing power lines and signal lines onboard of an aircraft, wherein the power lines and signal lines normally connect a 3-phase AC motor with the power supply system of the aircraft, and wherein the 3-phase AC motor has separate input terminals onto which, during operation of the 3-phase AC motor onboard of the aircraft, predetermined voltages of predetermined phase difference are to be applied. The method according to the invention comprises the steps of connecting the power lines and signal lines with input terminals (24) of a testing equipment (1), in place of the 3-phase AC motor; applying voltages on the power lines and signal lines; conducting a voltage test, and simultaneously with the voltage test, a phase test by the testing equipment (1) in respect of whether the voltages and the phase difference of the voltages applied to the power lines and signal lines is equal to the predetermined voltages and the predetermined phase difference.