钻石40飞机维护手册 DA 40 SERIES AMM 3(20)

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The electric actuator has an electric motor. The motor has a reduction gear which turns a spindle. The spindle operates a push-rod. The push-rod connects to an idler lever attached to the rear main bulkhead.
A cam attached to the push-rod operates five micro-switches. The micro-switches are part of the flaps electronic control circuit.
B. Push-rods and Bellcranks
The idler lever on the rear main bulkhead connects to two push-rods. The two push-rods connect to the inboard ends of long push-rods at the wing root ribs. The long push-rods connect to the flap bellcranks in the wings. A guide bearing holds each long rod at the root rib. Two short push-rods attach to the flap horns.
C. Torsion Tube
A cranked torsion tube connects to the inboard end of each flap. The torsion tube has 2 parts. Bolts attach the 2 parts of the torsion tube to each other in the fuselage.
A transfer lever attaches to the outboard end of each part of the torsion tube. The transfer lever has 2 transfer pins. The transfer pins engage with bushes in the root rib of the flap.
If there is a failure of the flap mechanical system, the torsion tube transfers movement from one flap to the other flap. It makes sure that the flaps are synchronized.
Doc # 6.02.01 Page 3
Rev. 4 09 Jan 2003

27-50-00
AMM
AIRCRAFT
Rigging Pin Hole
Right Flap Rib Right Flap
Right Wing Root Rib Guide Rollers Push Rod from Fuselage
Flap Idler Lever 
in the Fuselage 
Push Rod from 
Fuselage 
Guide Rollers 
Left Wing 
Root Rib 
Rigging  Left Flap 
Pin Hole 

Left Flap Rib
Figure 2: Flap Controls in the Wing
Page 4 Doc # 6.02.01 09 Jan 2003 Rev. 4
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Flight Controls
AMM

D. Flap Electrical Control
Figure 4 shows the flap electrical control system. The main bus or, if installed, the essential bus
% supplies power for the flaps. A circuit-breaker protects the circuit (Lycoming version: 5 amps, TAE
% version: 10 amps). See Chapter 92 for the wiring diagram.
The flap electrical control system uses solid-state electronics. It has an electronic control unit and a switchboard. The electronic control unit is located on the instrument panel. The switch board attaches to the flap actuator.
The electronic control unit has a 3-position selector switch and a flap position indicator. The selector switch can be set to:
) UP (fully up). 0o ± 1o
) T/O (take-off). 20o ± 2o
) LDG (landing). 42o ± 1o
The flap position indicator has three light-emitting diodes. The top diode lights when the flaps are in the UP position. The middle diode lights when the flaps are in the T/O position. The bottom diode lights when the flaps are in the LDG position.
The switch board attaches to the body of the flap actuator. The switch board has 5 micro switches. It also has a solid-state logic circuit board.
The logic circuits monitor the outputs from the selector switch and the micro-switches on the switch board. They control 4 power transistors. Two of the power transistors can connect the power supply to the flap motor. The other two can connect the motor to ground.
Two screws attach each micro-switch to the switch board. You can adjust the position of the switch board with 3 worm-drive clamps. The micro-switches have these functions:
) Micro-switch 1 - UP position.
) Micro-switch 2 - UP indication and T/O position moving down.
) Micro-switch 3 - T/O indication.
) Micro-switch 4 - LDG position.
) Micro-switch 5 - LDG indication T/O position moving up.
Cable harnesses with multi-pin connectors connect the components.
Doc # 6.02.01 Page 5
Rev. 4 09 Jan 2003

27-50-00
AMM
AIRCRAFT
Actuator Control Rod Worm-Drive Clamps
Circuit Board Actuator Motor
　
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