Flight Control Systems; Removal Of Bearings From Control Stick, Fork And Torque Tube; Installation Of Bearings In The Control Stick Fork And On The Torque Tube; Ailerons - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

Table of Contents

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH

Failure to stay within control surfaces static balance limits

could lead to control surface flutter, which could lead to loss

of aircraft, life, and/or property.

The control stick, which is supported by bushings and bearings, is attached to the torque

tube located on top of the cockpit floor. A series of push tubes, push rods and bell cranks

form solid connections between the control stick and the ailerons. The control stick

activates the elevators through push tubes, bell crank, idler and elevator horns. The

control stick forks and torque tube may be removed for replacement of bearings and

bushings.

REMOVAL OF BEARINGS FROM CONTROL STICK, FORK AND TORQUE TUBE

Remove the control stick dust cover base assembly and the side skins under the cockpit.

Use the following procedures to replace the bearings.

Disconnect the aileron push rods and elevator push tube.

Remove the attaching hardware securing the control stick fork to the torque tube.

Withdraw controls stick and fork from aircraft.

Remove the bolts securing the torque tube to the pillow blocks. (See Figure 7-1)

Remove the torque-tube from aircraft.

INSTALLATION OF BEARINGS IN THE CONTROL STICK FORK AND ON THE

Install bearings on the torque tube and in the control stick forks as required.

Install torque-tube in the pillow blocks.

Tighten pillow block hardware per torque values in Section II.

Install control sticks fork on torque tube and tighten hardware per torque values in

Section II.

Check freedom of movement on control stick and torque tube.

Lubricate bearings per Section II of this manual.

Connect the elevator push-tube and aileron push-rods and check for proper

operation of control system.

Replace control stick dust cover base assembly and aircraft side skins.

An all-metal aileron is installed outboard of each wing flap. Each aileron operates on

7-4

AIRCRAFT MAINTENANCE MANUAL

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