Abstract: An uplock is disclosed including a hook configured to engage a capture pin mounted on an aircraft component. The hook is mounted for movement between a closed position and an open position. The uplock further includes an indicator system configured to detect whether a pin is engaged with the hook when the hook is in the closed position.

Abstract: An uplock is disclosed including a hook configured to engage a capture pin mounted on an aircraft component. The hook is mounted for movement between a closed position and an open position. The uplock further includes an indicator system configured to detect whether a pin is engaged with the hook when the hook is in the closed position.

Abstract: A system for moving an aircraft door from an open position towards a closed position. The system includes an aircraft door actuator, an input receiving primary power from a primary power supply to power movement of the aircraft door from the open position towards the closed position, a secondary power supply to power the aircraft door actuator to move the aircraft door from the open position towards the closed position, and a controller configured to cause the secondary power supply to power the aircraft door actuator to cause the aircraft door actuator to move the aircraft door from the open position towards the closed position, on the basis of a determination that insufficient primary power is available from the primary power supply via the input to move the aircraft door from the open position towards the closed position.

Abstract: An aircraft undercarriage mechanism 20 comprising a first lock member 22 mounted on the undercarriage 14, the first lock member being engageable with a second lock member 24 mounted on a wing 10 of the aircraft. The first lock member 22 comprises a pivotable arm 26 which carries a roller 36. The roller 36 is rotatable and slidable on the arm 26 and is engageable with a catch 48 on the second lock member 24. The provision of the pivotable arm 26 and slidable roller 36 permits relative movement between the lock members 22, 24 when the undercarriage 14 is retracted with the lock members interengaged to minimise transmission of forces created by wing deflection from one lock member to the other.