Adjustable blade outer air seal apparatus

1. An adjustable blade outer air seal apparatus, comprising:

a case structure extending circumferentially;

a support ring structure mounted radially inwards of the case structure;

at least one blade outer air seal segment radially adjustably mounted relative to the support ring structure, the at least one blade outer air seal segment including a threaded shaft, and an actuation arm engaging a threaded portion of the threaded shaft, and a cavity extending through the threaded shaft; and

a sensor probe at least partially within the cavity.

2. The adjustable blade outer air seal apparatus as recited in claim 1 , wherein the at least one blade outer air seal segment includes the threaded shaft extending through an unthreaded opening in the support ring structure.

3. The adjustable blade outer air seal apparatus as recited in claim 1 , including a clamp member secured on the threaded shaft such that the actuation arm is secured between the clamp member and the support ring structure.

4. The adjustable blade outer air seal apparatus as recited in claim 1 , including an adjustable spacer mounted adjacent the support ring structure, the adjustable spacer including an adjustable radial dimension that controls a radial position of the at least one blade outer air seal segment relative to the support ring.

5. The adjustable blade outer air seal apparatus as recited in claim 1 , wherein the support ring structure is non-rigidly mounted to the case structure.

6. The adjustable blade outer air seal apparatus as recited in claim 1 , wherein the at least one blade outer air seal segment and the support ring structure include an anti-rotation feature that limits rotation of the at least one blade outer air seal segment about a radial axis, the anti-rotation feature comprising a tab and a slot received in the tab.

7. The adjustable blade outer air seal apparatus as recited in claim 1 , rotation of the actuation arm radially moves the at least one blade outer air seal segment via the threaded shaft.

8. The adjustable blade outer air seal apparatus as recited in claim 1 , wherein the threaded shaft includes a threaded tip end, and further comprising the actuation arm engaged with the threaded tip end.

9. An adjustable blade outer air seal apparatus, comprising:

a case structure extending circumferentially;

a support ring structure mounted radially inwards of the case structure;

at least one blade outer air seal segment radially adjustably mounted relative to the support ring structure, the at least one blade outer air seal segment including a threaded shaft, and an actuation arm engaging a threaded portion of the threaded shaft, and a cavity extending through the threaded shaft, wherein the cavity has an end that opens at a radially inner seal surface of the at least one blade outer air seal segment.

10. The adjustable blade outer air seal apparatus as recited in claim 9 , including a sensor probe at least partially within the cavity, the sensor probe having a probe end that is flush with the seal surface.

11. An adjustable blade outer air seal apparatus, comprising:

a case structure extending circumferentially;

a support ring structure mounted radially inwards of the case structure;

an adjustable spacer mounted adjacent the support ring structure, the adjustable spacer including an adjustable radial dimension; and

a blade outer air seal segment mounted relative to the support ring structure such that the adjustable radial dimension of the adjustable spacer controls a radial position of the blade outer air seal segment relative to the support ring structure, the blade outer air seal segment including a threaded shaft, and an actuation arm engaging a threaded portion of the threaded shaft, and a cavity extending through the threaded shaft; and

a sensor probe at least partially within the cavity.

12. The adjustable blade outer air seal apparatus as recited in claim 11 , wherein the adjustable spacer includes a plurality of washers.

13. The adjustable blade outer air seal apparatus as recited in claim 12 , wherein the blade outer air seal segment includes the threaded shaft extending through an unthreaded opening in the support ring structure and the actuation arm engaging a threaded portion of the threaded shaft.

14. The adjustable blade outer air seal apparatus as recited in claim 11 , wherein the blade outer air seal segment includes a clamp member secured on the threaded shaft such that the actuation arm is secured between the clamp member and the support ring structure.

15. The adjustable blade outer air seal apparatus as recited in claim 14 , including a bushing between the actuation arm and the support ring structure, and the adjustable spacer is between the bushing and the support ring structure.

16. The adjustable blade outer air seal apparatus as recited in claim 14 , wherein the adjustable spacer is between the actuation arm and the support ring structure.

17. A method of adjusting a blade outer air seal apparatus, comprising:

radially adjusting at least one blade outer air seal segment relative to a support ring structure that is mounted radially inwards of a case structure extending circumferentially, the at least one blade outer air seal segment including a threaded shaft, and an actuation arm engaging a threaded portion of the threaded shaft, and a cavity extending through the threaded shaft, and a sensor probe at least partially within the cavity.

18. The method as recited in claim 17 , including radially adjusting the at least one blade outer air seal segment in response to at least one of an aircraft maneuver and a detected engine temperature.

19. The method as recited in claim 17 , including radially adjusting the at least one blade outer air seal segment in a response time of less than one second between a signal to move the at least one blade outer air seal segment and movement between radial positions of the at least one blade outer air seal segment.

20. A gas turbine engine comprising:

a compressor section;

a combustor section in fluid communication with the compressor section; and

a turbine section in fluid communication with the combustor, and

at least one of the compressor section and the turbine section including an adjustable blade outer air seal apparatus comprising a case structure extending circumferentially about an engine central axis, a support ring structure mounted radially inwards of the case structure and at least one blade outer air seal segment radially adjustably mounted relative to the support ring structure, the at least one blade outer air seal segment including a threaded shaft, and an actuation arm engaging a threaded portion of the threaded shaft, and a cavity extending through the threaded shaft, and a sensor probe at least partially within the cavity.

21. The gas turbine engine as recited in claim 20 , including a fan coupled to be driven through a gear assembly by the turbine section.