There is provided a lower attachment 2 for a trimmable horizontal stabiliser actuator (THSA) 1 for connecting the THSA 1 to a flight control surface, the lower attachment 2 comprising: a nut assembly 18 for providing a load path through the THSA 1 to the flight control surface when the THSA 1 is connected to the flight control surface, comprising: a nut 26 for location on a screw shaft 8 of the THSA 1, a failsafe plate 20 for coupling to the flight control surface, and a transfer plate 22 for transferring load between the failsafe plate 20 and the nut 26; wherein the nut assembly 18 has a first unloaded configuration in which there is no contact between the nut 26 and the transfer plate 22, and a second loaded configuration in which there is contact between a first pair of opposed surfaces 34 of the nut 26 and the transfer plate 22, and a clearance 40 between a second pair of opposed surfaces 36 of the nut 26 and the transfer plate 22; and a locking assembly 44 operable to prevent relative movement of the nut 26 and the transfer plate 22 in response to the nut assembly 18 transitioning to the second configuration.
LOWER ATTACHMENT FOR TRIMMABLE HORIZONTAL STABILISER ACTUATOR
FIXATION INFERIEURE POUR UN ACTIONNEUR DE STABILISATEUR HORIZONTAL AJUSTABLE
2024-06-07
Patent
Electronic Resource
English
IPC: | B64C AEROPLANES , Flugzeuge |
LOWER ATTACHMENT FOR TRIMMABLE HORIZONTAL STABILISER ACTUATOR
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