Patent ID: 11873092
Assignee: THE BOEING COMPANY
Field: Transport (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 12:
13. A method of using the trim actuator according to claim 10 to control the horizontal stabilizer of the aircraft, the method comprising steps of:
frictionally coupling the power screw with the anti-back-drive mechanism to prevent rotation of the power screw in the first rotational direction when the first force is applied to the nut in the first axial direction along the power screw;
frictionally coupling the power screw with the anti-back-drive mechanism to prevent rotation of the power screw in the second rotational direction, opposite the first rotational direction, when the second force is applied to the nut in the second axial direction, opposite the first axial direction; and
measuring the internal loading of the anti-back-drive mechanism when the first force is applied to the nut in the first axial direction along the power screw and when the second force is applied to the nut in the second axial direction, opposite the first axial direction, using the sensor.