公开(公告)号：US10919642B2

公开(公告)日：2021-02-16

申请号：US15888120

申请日：2018-02-05

Applicant: AIRBUS OPERATIONS LIMITED

Inventor： Christopher Papadopoulos ,  Matthew Marples ,  Andy Mounty ,  Costas Fanourakis ,  Graham King

IPC: B64D45/00 ,  B64C25/22 ,  B64C25/34 ,  F15B15/14 ,  F15B19/00 ,  B64F5/60 ,  F15B1/24 ,  B64C25/58 ,  B64C13/48 ,  F15B1/08

Abstract: A landing gear system for an aircraft includes a retractable landing gear assembly, a hydraulic actuator for actuating movement part, for example a bogie of the landing gear assembly, and an accumulator associated with the actuator. The accumulator comprises a volume of pressurised gas separated from hydraulic fluid by a separator piston. Travel of the separator piston beyond a certain position is indicative of a fault. The accumulator includes a snubbing device that acts to slow movement of the separator piston beyond that position. A monitoring system measures the time taken for the movement of the landing gear part effected by the hydraulic actuator. If the measured time is longer than a threshold time, that is indicative of a possible fault in the accumulator, that might, without the snubbing, remain undetected and/or hidden from view.