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Maintenance Practices
1. General
These maintenance practices tell you how to remove and install the components of the flap control system. They also tell you how to test and adjust the system. See Section 57-50 for data about removing and installing the flaps.
WARNING: WHEN YOU DO WORK ON THE AIRPLANE CONTROLS, YOU MUST
MAKE SURE THE AREAS AROUND THE CONTROLS/CONTROL
SURFACES ARE CLEAR OF PERSONS/EQUIPMENT. IF YOU DO NOT
DO THIS, INJURY TO PERSONS AND DAMAGE TO CONTROL
SURFACES CAN OCCUR.
WARNING: WHEN YOU COMPLETE WORK ON THE CONTROLS, MAKE SURE
THAT YOU REMOVE ALL LOOSE ITEMS/TOOLS FROM THAT AREA.
LOOSE ITEMS/TOOLS CAN PREVENT FULL MOVEMENT OF THE
AIRPLANE CONTROLS. THIS CAN CAUSE DEATH OR INJURY TO
PERSONS.
2. Remove/Install the Flap Actuator
Refer to Figures 1 & 3.
A. Remove the Flap Actuator
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Detail Steps/Work Items Key Items/References
(1) If possible, set the flaps to the T/O position.
(2) Disconnect the airplane main battery. Refer to Section 24-31 (Lycoming version) or 24-34 (TAE version).
(3) Remove the passenger seat. Refer to Section 25-10.
(4) Disconnect the electrical supply connector to the flap motor.
(5) Disconnect the control harness plug from the switch-board.
(6) Remove the bolt which attaches the actuator push-rod to the idler lever. At the rear main bulkhead. Hold the flaps.
(7) Lower the flaps by hand until they stop.
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Detail Steps/Work Items Key Items/References
(8) Remove the bolt which attaches the actuator body to the mounting bracket. At the left rear closing rib.
(9) Remove the actuator from the airplane.
B. Install the Flap Actuator
Detail Steps/Work Items Key Items/References
(1) Put the flap actuator in position in the fuselage.
(2) Install the bolt which attaches the actuator body to the mounting bracket. At the left rear closing rib. Make sure that the bush is in position in the actuator swivel block. Torque: 6.4 Nm (4.7 ft.lb).
(3) Install the bolt which attaches the actuator push-rod to the idle lever. At the rear main bulkhead. Hold the flaps. Torque: 6.4 Nm (4.7 ft.lb).
(4) Connect the control harness plug for the switch-board.
(5) Connect the electrical supply connector to the flap motor.
(6) Connect the airplane main battery. Refer to Section 24-31 (Lycoming version) or 24-34 (TAE version).
(7) Do the adjustment procedure. See Paragraph 4.
(8) Do an inspection of all the controls that you have connected. S If necessary for your airworthiness authority, do a second inspection of the controls.
(9) Install the passenger seat. Refer to Section 25-10.
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3. Test the Flap Control System
A. Equipment
Item Quantity Part Number
Inclinometer. 1 Commercial.
Spring balance. 1 Commercial.
B. Test the Flap Control System Procedure
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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(23)
