Gas turbine engine support structure with internal lattice

1. A manufacturing method, comprising:

additively manufacturing a body that includes

an engine case for a gas turbine engine;

a support structure projecting out from the engine case, the support structure including a lattice, a wall and an internal volume, the wall surrounding the lattice, and the internal volume within the support structure along the lattice, wherein the internal volume is filled with powder; and

an aperture at an intersection between the engine case and the support structure; and

extracting the powder from the internal volume through the aperture; wherein the body forms a stationary structure of the gas turbine engine.

2. The manufacturing method of claim 1 , wherein the aperture is arranged at a gravitational bottom of the internal volume during at least one of the extracting of the powder or the additive manufacturing of the body.

3. The manufacturing method of claim 1 , wherein the aperture projects through the wall.

4. The manufacturing method of claim 1 , wherein the aperture is disposed outside of a fillet between the support structure and the engine case.

5. The manufacturing method of claim 1 , wherein the internal volume comprises at least one of

interstices within the lattice; or

interstices between the wall and the lattice.

6. The manufacturing method of claim 1 , wherein

the internal volume comprises a plurality of passages; and

the powder is extracted from the plurality of passages through the aperture.

7. The manufacturing method of claim 1 , wherein

the support structure further includes a first member and a second member;

the first member projects out from the engine case along a first trajectory;

the second member projects out from the engine case along a second trajectory that is angularly offset from the first trajectory; and

the internal volume is within the first member and the second member.

8. The manufacturing method of claim 7 , wherein the first member diverges away from the second member as the first member extends along the first trajectory.

9. The manufacturing method of claim 7 , wherein the first member converges towards the second member as the first member extends along the first trajectory.

10. The manufacturing method of claim 7 , wherein an intersection between the first member and the second member is located at the engine case.

11. The manufacturing method of claim 7 , wherein an intersection between the first member and the second member is located away from the engine case.

12. The manufacturing method of claim 1 , wherein the internal volume comprises a passage that follows a tortuous path through the support structure to the aperture.

13. The manufacturing method of claim 1 , wherein the lattice structure comprises a triply periodic minimal surface structure.

14. The manufacturing method of claim 1 , wherein

a bore extends within the lattice; and

the bore is fluidly decoupled from the internal volume.

15. The manufacturing method of claim 1 , wherein

the body further includes at least a section of a vehicle body; and

the support structure extends between and connects the engine case and the section of the vehicle body.

16. The manufacturing method of claim 1 , wherein the body further includes an actuator mount spaced outboard from the engine case.

17. A manufacturing method, comprising:

additively manufacturing a body including an engine case of a gas turbine engine and a support structure projecting out from the engine case, the engine case extending axially along and circumferentially around an axial centerline, the support structure including a lattice, an exterior wall and a passage, the lattice comprising a triply periodic minimal surface structure, the exterior wall surrounding the lattice, and the passage extending within the support structure through the lattice, wherein the body forms a stationary structure of the gas turbine engine; and

extracting powder out of the passage through an aperture in the body.

18. A manufacturing method, comprising:

additively manufacturing a body that includes

an engine case for a gas turbine engine;

a support structure projecting out from the engine case, the support structure including a lattice, a wall and an internal volume, the wall surrounding the lattice, and the internal volume within the support structure along the lattice, wherein the internal volume is filled with powder; and

an aperture at an intersection between the engine case and the support structure; and

extracting the powder from the internal volume through the aperture; wherein

the body further includes a combustor; and

wherein the engine case extends axially along and circumferentially around the combustor.

19. A manufacturing method, comprising:

additively manufacturing a body that includes

an engine case for a gas turbine engine;

a support structure projecting out from the engine case, the support structure including a lattice, a wall and an internal volume, the wall surrounding the lattice, and the internal volume within the support structure along the lattice, wherein the internal volume is filled with powder; and

an aperture at an intersection between the engine case and the support structure; and

extracting the powder from the internal volume through the aperture; wherein the body is configured to house a compressor rotor and a turbine rotor within an interior volume of the body.