Mixture Engine Controls Pivot Propeller
Throttle Tubular spacers
Propeller
Brake/Heat Controls Pivot
Figure 25: Engine Control Assembly in the Center Console
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Indicating Systems
AMM
B. Engine Control Assembly
The engine control assembly in the center console has these controls:
) Throttle.
) Propeller.
) Mixture.
) Parking brake.
) Cabin Heat control lever.
) Distribution control lever for Cabin Air.
The 3 engine control levers are on one pivot shaft at the rear of the assembly. A knob on the right side of the assembly adjusts throttle (mixture and propeller) friction. The parking brake and cabin heat control levers are also on one shaft at the top front of the assembly. Friction discs, stators and spring washers hold both groups of levers in position on the shafts.
The assembly has 2 aluminum-alloy side-plates. Four sheet-metal brackets hold the outer sheaths of the control cables. A metal bracket at the front top attaches to the bottom of the instrument panel. A metal bracket at the back attaches to the elevator trim mounting. Rivets attach all of the metal brackets to the side plates.
Bolts hold 5 tubular spacers between the side plates. The spacers make fixed stops for the control levers. Two of the spacers also hold one end of the friction stators for each group of levers.
Two bolts attach the engine control assembly to the bottom of the instrument panel. Bolts attach the assembly to the side walls of the floor panel.
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Trouble-Shooting
1. General
Trouble Possible Cause Repair
Engine control levers do not stay in the set position. Too much wear in the friction washers. Friction tension too low. Replace the friction washers. Adjust the friction.
Parking brake or cabin heat control levers do not stay in the set position. Friction tension too low. Too much wear in the friction washers. Adjust the friction. Replace the friction washers.
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Maintenance Practices
1. General
These maintenance practices tell you how to remove/install the engine control assembly. See the related Chapter for data about indicators in other systems.
2. Remove/Install the Central Control Panels
A. Remove the Engine Control Assembly
Detail Steps/Work Items Key Items/References
(1) Remove the knob from the fuel selector valve: S Remove the cross-head screw from the center of the control-knob and pull the knob up and off the fuel selector valve. S Remove the mounting plate.
(2) Remove the engine control assembly rear cover plate: S Remove the 4 cross-head screws which attach the cover plate. S Lift the rear of the cover plate a small amount and pull the cover plate backwards and clear of the control assembly.
(3) Remove the front cover plate: S Remove the 2 hex-headed bolts which attach the cover plate to the control assembly. S Move the cover plate down and clear of the control assembly.
(4) Loosen the throttle friction adjuster until the knob releases from the threaded shaft.
(5) Lift the engine control assembly clear of the center console and support it. Hold the friction adjuster knob clear. Make sure that you do not pull on the control cables.
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DA 40 Series
Detail Steps/Work Items Key Items/References 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：钻石40飞机维护手册 DA 40 SERIES AMM 3(62)
