CHAPTER 67
FLIGHT CONTROLS
67-00 Description
Dual controls, which are removable on the left side, are standard equipment. All primary
controls are actuated through push-pull tubes and bellcranks. Bearings used throughout the
control system are either sealed ball bearings or have self-lubricated Teon® liners.
R66 ight controls operate conventionally. The cyclic stick appears different, but the grip
moves the same as in other helicopters due to the free hinge at the center pivot. The cyclic
grip is free to move vertically allowing the pilot to rest his forearm on his knee if he chooses.
The collective control is also conventional. A twist grip provides input to the engine fuel
control, and raising or lowering the collective provides power turbine governor inputs via an
interconnecting linkage.
Pilot-side tail rotor pedals are adjustable. To adjust, extract quick-release pin on each pedal by
depressing button and pulling. Slide pedal fore or aft to most comfortable of three adjustment
positions, and reinstall quick-release pin. Verify pins secure before ight.
See R66 Pilot's Operating Handbook (POH) Section 7 for instructions to remove (removable)
ight controls.
See Section 67-50 for hydraulic system description.
WARNING
Assembly of flight controls is critical and requires inspection
by a qualified person. If a second person is not available, the
installer must take a 5-minute break prior to inspecting flight
control connections he has assembled.
67-10 Cyclic Controls
Refer to R66 Illustrated Parts Catalog (IPC) Chapter 67.
67-11 Cyclic Control Assembly
A. Removal
1. Refer to Section 6-70. Remove F794-1 (forward) and F794-2 (aft) belly panels,
F680-3 (pilot collective) and F445-1 (forward tunnel) cover assemblies, and F461-1
(collective cross tube) and F463-1 (aft tunnel) cover assemblies. Open upper console,
disconnect OAT gage and hourmeter wiring connectors, and remove radio faceplate.
Remove plastic hole plug from vertical keel panel beneath RH, aft seat.
2. Turn cyclic friction OFF. Gently punch out cyclic friction knob spring pin and remove
knob. Remove hardware securing F444-1 cover assembly to F338-1 box, unsnap
boot, and lift cover assembly to expose wire harness connectors. Disconnect anti-
ice, pitot heat, and ELT switch (if installed) wiring. Snap boot together at top of
cyclic stick to secure cover. Install pin on cyclic friction shaft to retain spacers.
3. Refer to Figure 67-1. Unhook D918-1 cord assembly from C069-8 (cyclic) stick
assembly and D918-2 cord assembly from C177-5 pivot assembly.
4. Disconnect wiring exiting D320-8 stick at connectors near bottom of stick.
MAR 2012 R66 Maintenance Manual Chapter 67 Flight Controls Page 67.1
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