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Use Locoloc thimbles and oval sleeves for
3.2 mm diameter steel cables to
specification MS 51844.
DA20-C1 AMM
Flight Controls
Doc # DA201-C1
Rev. 0 27-20-00 Page 209
19 Dec 1997
Detail Steps/Work Items Key Items
(2) Push the control cable through the teflon
tubes from the front.
Refer to Fig: 1.
(3) Install a new eye end to the cable at the
rudder end.
− Inspect the cable eye-end for correct
assembly.
− If necessary for your airworthiness
authority, send a sample for proof test.
Use Locoloc thimbles and oval sleeves for
3.2 mm diameter steel cables to
specification MS 51844.
(4) Install the cable to the rudder lower mounting
bracket:
− Install the bolt that attaches the cable to
the lower mounting bracket.
− Tighten the bolt.
Torque to 6.5 Nm (4.6 ft.lb).
(5) Install the turnbuckle to the rudder yoke:
− Install the bolt that attaches the
turnbuckle to the rudder yoke.
− Tighten the bolt.
Torque to 6.5 Nm (4.6 ft.lb).
(6) Install the rudder. Refer to Chapter 55-40.
(7) Adjust both the rudder cables to give the
correct tension.
Refer to the Rudder Adjustment Procedure
in this Chapter.
(8) Do a check of the rudder range of
movement.
Refer to the Rudder Control System Test
For Correct Range Of Movement in this
Chapter.
(9) Do an inspection of all the controls that you
have adjusted.
− If necessary for your airworthiness
authority, do a second inspection of the
controls.
(10) Install these items:
− Pilots seats.
− Baggage compartment floor.
− Fuel Tank.
Refer to Chapters:
− 25-10.
− 25-10.
− 28-10.
Flight Controls
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Intentionally left blank
DA20-C1 AMM
Flight Controls
Doc # DA201-C1
Rev. 0 27-30-00 Page 1
29 Apr 2004
CHAPTER 27 - 30
FLIGHT CONTROLS-ELEVATOR
1. General
The DA20-C1 has the usual elevator flight controls. An elevator attached to the horizontal stabilizer
gives longitudinal control. The two control sticks operate the elevator.
Flight Controls
DA20-C1 AMM
Page 2
19 Dec 1997 27-30-00 Doc # DA201-C1
Rev. 0
Figure 1: Elevator Controls
DA20-C1 AMM
Flight Controls
Doc # DA201-C1
Rev. 0 27-30-00 Page 3
19 Dec 1997
2. Description
Figure 1 shows the elevator controls in the fuselage.
Each pilot has a control stick that attaches to a torque tube assembly. The torque tube assembly
has a lever which attaches to a short control rod. The short control rod attaches to a long control
rod behind the aft control bulkhead. The aft control bulkhead has an UHMW bush for the short
control rod.
The long control rod has two bearings. The half ring bulkhead and ring bulkhead #2 have push-rod
guides. Each guide has three rollers.
The long control rod attaches to the bellcrank at the bottom of the vertical stabilizer. The bellcrank
attaches to a vertical control rod in the vertical stabilizer. The vertical control rod connects to the
elevator horn.
The vertical control rod in the vertical stabilizer has a spring assembly attached. The spring
assembly connects to the trim motor. See Chapter 27-31 for data about the trim system.
Flight Controls
DA20-C1 AMM
Page 4
19 Dec 1997 27-30-00 Doc # DA201-C1
Rev. 0
3. Operation
If you move the control stick forward:
− The torque tube assembly turns.
− The lever below the torque tube assembly pushes the short control rod aft.
− The short control rod pushes the long control rod aft.
− The long control rod pushes the bellcrank rearward.
− The bellcrank pushes the vertical control rod up.
− The vertical control rod moves the elevator horn.
− The elevator moves down.
If you move the control stick aft:
− The torque tube assembly turns.
− The short and long control rods move forward.
− The bellcrank pulls the vertical control rod down.
− The elevator moves up.
DA20-C1 AMM
Flight Controls
Doc # DA201-C1
Rev. 0 27-30-00 Page 101
19 Dec 1997
TROUBLE SHOOTING
1. General
The table below lists the defects you could have in the elevator control system. If you have the
trouble detailed in the Trouble column read across to the Possible Cause column. Then do the
repair in the Repair column.
Trouble Possible Cause Repair
Control vibration in the air. Too much backlash in the flight
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