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1. General...................................................................................................................201
2. Remove/Install The Elevator Trim Actuator ...........................................................201
CHAPTER 27-50 FLIGHT CONTROLS - FLAPS ...........................................................................1
1. General.......................................................................................................................1
2. Description..................................................................................................................3
3. Operation....................................................................................................................7
4. Fail-Safe Operation ....................................................................................................7
TROUBLE SHOOTING...............................................................................................................101
1. General...................................................................................................................101
MAINTENANCE PRACTICES ....................................................................................................201
1. General...................................................................................................................201
2. Remove/Install the Flap Actuator ...........................................................................201
3. Adjust/Test the Flap System ..................................................................................203
Flight Controls
DA20-C1 AMM
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DA20-C1 AMM
Flight Controls
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CHAPTER 27-00
FLIGHT CONTROLS
1. General
This chapter tells you about the operation and the adjustment of the flight controls. It also tells you
about the assembly of the flight controls. Refer to the related section for the data on a specified
system.
This Chapter tells you how standard parts are used to make the flight controls for each system.
2. Description
The DA20-C1 has the usual flight controls. An elevator attached to the horizontal stabilizer gives
longitudinal control. Ailerons attached to the trailing edge of each wing give lateral control. The
rudder attached to the Vertical Stabilizer gives yaw control. Flaps attached to the trailing edge of
each wing give extra lift for landing and for take-off.
The DA20-C1 has a control stick for each pilot. The pilot can set the elevator trim with a control
switch in the center console.
Each pilot has a rudder pedal assembly. The assembly attaches to the cockpit floor. The pilot can
adjust the position of the rudder pedals with a T-grip selector on the rudder pedal assembly.
The pilot moves each primary control through a system of control rods and bellcranks. Cables
operate the rudder. An electric actuator operates the flaps.
3. Control Rods
The control rods used in the DA20-C1 have standard end fittings. Also most rods use a standard
diameter tube. Only the length of the rods is special.
Figure 1 shows an example of a standard control rod. The rod has adjustable end fittings. Each
end fitting has an eye end with a threaded shaft. The eye end has a bearing. A lock nut on the
threaded shaft locks the eye end in position. You can turn the eye end to adjust the length of the
rod.
A steel tube connects the end fittings. Threaded inserts are welded into position in the end of each
steel tube. A safety hole is drilled in each end of the steel tube. The safety hole shows you if the
installation of the eye end to the insert in the steel tube is correct. If you can push the safety wire
through the hole to the other side, the eye end installation is not correct. But, if you cannot push the
safety wire through the hole, the eye end installation is correct.
Flight Controls
DA20-C1 AMM
Page 2
19 Dec 1997 27-00-00 Doc # DA201-C1
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Figure 1: Standard Control Rod
DA20-C1 AMM
Flight Controls
Doc # DA201-C1
Rev. 0 27-00-00 Page 201
19 Dec 1997
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove and install the control stick.
WARNING: DO ALL THE STEPS OF THE CONTROL STICK INSTALL
PROCEDURE CAREFULLY. CONTROL FAILURE CAN OCCUR IF
THE CONTROL STICK INSTALLATION PROCEDURE IS NOT DONE
CORRECTLY. THIS CAN CAUSE DEATH OR INJURY TO
PERSONNEL.
WARNING: WHEN YOU DO WORK ON THE AIRPLANE CONTROLS. YOU MUST
MAKE SURE THE AREA AROUND THE CONTROLS/CONTROL
SURFACES ARE CLEAR OF PERSONNEL/EQUIPMENT. IF YOU DO
　
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