Cirrus SR22 Maintenance Manual

M O D E L S R 2 2 76-00 Page 1 All EFFECTIVITY: ENGINE CONTROLS 1. GENERAL This chapter describes the controls which govern operation of the engine. The engine controls for the air- plane consist of the following: throttle, mixture, and propeller governor. The primary controls employ con- ventional push-pull type levers and are connected to a control quadrant mounted forward on the center console. The quadrant control assembly incorporates a friction lock which can be adjusted to retain the throttle and mixture control lever positions. The throttle control lever is connected through a cable to the throttle body mounted forward of the induction duct assembly. The propeller governor control cable is terminated on a cam follower plate which is integral to the throttle control lever. This connection allows the propeller speed to be mechanically adjusted to the throttle setting. Under this arrangement, the propeller is set to 2700 RPM for full forward throttle takeoff and climb, 2500 RPM for mid to full throttle cruise, and approximately 1900 RPM at lower power. For additional mainte- nance practices regarding the propeller governor refer to Chapter 61, Propeller. (Refer to 61-00) The mixture control lever is connected through a cable to the fuel pump centrally located on the aft side of the engine. 15 Apr 2007

M O D E L S R 2 2 15 Apr 2007 2. TROUBLESHOOTING Trouble Probable Cause Remedy Power lever binding. Control quadrant friction lock knob too tight. Loosen friction lock knob. Control cable defective or worn. Perform Adjustment/Test - Control Quadrant. (Refer to 76-10) Quadrant assembly nuts too tight. Loosen nuts, reinstall cotter pins. Bearing worn on cam follower. Replace bearing. Mixture lever binding. Control quadrant friction lock knob too tight. Loosen friction lock knob. Cable defective or worn. Replace cable. Engine RPM too high or low dur- ing flight. Propeller governor cable rod ends not properly adjusted. Perform Adjustment/Test - Gover- nor Rigging and Low-Pitch Stop Adjustment. (Refer to 61-20) Tachometer malfunctioning. Inspect and replace (if necessary). (Refer to 77-10) Propeller governor malfunctioning. Inspect and replace (if necessary). (Refer to 61-20) No tachometer indication when engine running. Tachometer malfunctioning. Inspect and replace (if necessary). (Refer to 77-10) Erratic tachometer indication when engine running smoothly. Tachometer malfunctioning. Inspect and replace (if necessary). (Refer to 77-10)