公开(公告)号：US20180222599A1

公开(公告)日：2018-08-09

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

CPC classification number: B64D45/0005 ,  B64C13/48 ,  B64C25/22 ,  B64C25/34 ,  B64C25/58 ,  B64D45/00 ,  B64D2045/0085 ,  B64F5/60 ,  F15B1/021 ,  F15B1/24 ,  F15B15/1409 ,  F15B19/005 ,  F15B2201/205 ,  F15B2201/31 ,  F15B2201/505 ,  F15B2211/212 ,  F15B2211/6336

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.