Abstract: A lock plate for preventing relative movement between a first component and an adjoining second component, comprises a first end, a second end, and a planar portion extending between the first end and the second end. The first end is configured to locate against one of the first component and the second component, while the second end is configured to locate against the other one of the first component and the second component. The planar portion comprises a first projection positioned substantially mid-way between the first end and the second end. The first projection protrudes from a plane defined by the planar portion and may readily be severed by a user to thereby separate the first and second component from one another.

Abstract: A method of determining the actual position of a control surface (27). The method comprises receiving a signal (34) representative of a required position of the control surface (27), repositioning the control surface (27) in response to the signal (34) by moving an actuator (26), measuring a secondary position indicator, calculating the actual position of the control surface (27) on the basis of the secondary position indicator and, comparing the actual position with the required position.

Abstract: A lock plate for preventing relative movement between a first component and an adjoining second component, comprises a first end, a second end, and a planar portion extending between the first end and the second end. The first end is configured to locate against one of the first component and the second component, while the second end is configured to locate against the other one of the first component and the second component. The planar portion comprises a first projection positioned substantially mid-way between the first end and the second end. The first projection protrudes from a plane defined by the planar portion and may readily be severed by a user to thereby separate the first and second component from one another.