Thank you for choosing Aerospace-Aviation360 for Part Number 5916816 described as Test Set, Linear Servo Actuator. Adjustment & Mechanical Positioning Of Both Servo Actuators During Rigging Of The Mach Trim Compensator Actuator & Yaw Damper. Yaw Damper Test Portion Only Is Applicable To The 717. by Mcdonnell Douglas. This is an ASAP Semiconductor owned and operated website. We are a leading supplier of aircraft tooling parts. You have 24/7 x 365 access to our diverse product database with the fastest lead times in the industry.