Abstract: An aircraft assembly including: an aircraft structure; a pipe assembly; a fixture arrangement attached to the aircraft structure, the fixture arrangement contacting the pipe assembly via a curved bearing surface having curvature in two orthogonal directions; the curved bearing surface configured to enable the pipe assembly to rotate relative to the fixture arrangement about three perpendicular axes; wherein the pipe assembly comprises a stop member adjacent the fixture arrangement, a contact surface of the stop member configured to abut a contact surface of the fixture arrangement so as to restrict axial movement of the pipe assembly relative to the fixture arrangement, and wherein a distance between the contact surface of the fixture arrangement and the contact surface of the stop member increases radially from the longitudinal pipe axis.

Abstract: An aircraft pipework assembly is disclosed including an aircraft structure; pipework; a fixture arrangement between the pipework and the aircraft structure; a tie rod connecting the pipework to the aircraft structure; a first tie rod bearing which connects the tie rod to the pipework; and a second tie rod bearing which connects the tie rod to the aircraft structure. The fixture arrangement includes a spherical bearing, the spherical bearing comprising a ball mounted to the pipework, and a housing coupled to the aircraft structure. The ball includes a convex spherical bearing surface; and the housing comprises a concave spherical bearing surface which mates with the convex spherical bearing surface of the ball. The fixture arrangement is configured to enable the pipework to translate relative to the ball in an axial direction aligned with a longitudinal axis of the pipework.

Abstract: An aircraft pipework assembly is disclosed including an aircraft structure; pipework; a fixture arrangement between the pipework and the aircraft structure; a tie rod connecting the pipework to the aircraft structure; a first tie rod bearing which connects the tie rod to the pipework; and a second tie rod bearing which connects the tie rod to the aircraft structure. The fixture arrangement includes a spherical bearing, the spherical bearing comprising a ball mounted to the pipework, and a housing coupled to the aircraft structure. The ball includes a convex spherical bearing surface; and the housing comprises a concave spherical bearing surface which mates with the convex spherical bearing surface of the ball. The fixture arrangement is configured to enable the pipework to translate relative to the ball in an axial direction aligned with a longitudinal axis of the pipework.

Abstract: A pipe spacer for separating inner and outer pipes of a double-walled pipe is disclosed including an inner circumferential bearing surface for contacting an inner pipe of a double-walled pipe assembly; an outer circumferential bearing surface for contacting an outer pipe of the double-walled pipe assembly; at least three inner lobes, each of the inner lobes having an apex on which lies the inner circumferential bearing surface; and the outer circumferential bearing surface is curved in two orthogonal directions.

Abstract: An aircraft assembly including: an aircraft structure; a pipe assembly; a fixture arrangement attached to the aircraft structure, the fixture arrangement contacting the pipe assembly via a curved bearing surface having curvature in two orthogonal directions; the curved bearing surface configured to enable the pipe assembly to rotate relative to the fixture arrangement about three perpendicular axes; wherein the pipe assembly comprises a stop member adjacent the fixture arrangement, a contact surface of the stop member configured to abut a contact surface of the fixture arrangement so as to restrict axial movement of the pipe assembly relative to the fixture arrangement, and wherein a distance between the contact surface of the fixture arrangement and the contact surface of the stop member increases radially from the longitudinal pipe axis.