Landing gear controller, system and method for detecting failure of a landing gear uplock hook (40, fig 1a) , the controller is configured to detect an extension time for a landing gear, and if the detected time meets a predetermined criteria, a warning signal indicates potential failure of a landing gear uplock hook. The method of detecting failure of a landing gear uplock hook comprises moving a landing gear bay door from a closed to an open position 308; extending the landing gear from a retracted to an extended position 310; measuring an extension time 320; determining if the measured time meets a predefined criterion 330, and if the predefined criterion is met, provide a warning signal indicating potential failure of a landing gear uplock hook 340. A landing gear controller that is configured to delay extension of a landing gear, measure the time taken for the landing gear to reach an extended position, and comparing the time to a threshold time, and issue a warning if the measured time differs by a predetermined amount is also provided. Preferably the landing gear is defined as the two main landing gears of an aircraft which are configured to extend simultaneously.
Landing gear controller
19.06.2019
Patent
Elektronische Ressource
Englisch