Robinson R66 - Tail Rotor Assembly

CHAPTER 64
TAIL ROTOR
64-00 Description
The R66 tail rotor assembly is a conventional, two-bladed teetering rotor system.
Tail rotor blades are constructed of a wrap-around aluminum skin, bonded to aluminum
honeycomb and a forged aluminum root fitting. Self-lubricating spherical bearings in the
root fitting allow blades to change pitch.
Tail rotor blades are assembled to the hub with a fixed precone angle.
The tail rotor aluminum hub mounts to the gearbox output shaft by teeter hinge. Elastomeric
bearings in the hub allow the rotor to teeter. The tail rotor hub teetering stop is a urethane
bumper, attached to the output shaft.
64-10 Tail Rotor Assembly
A. Removal
1. Refer to Figure 64-1. Tag each pitch link with corresponding blade serial number
for reinstallation. Remove hardware securing pitch links to tail rotor blades, noting
hardware removed.
NOTE
Tail rotor pitch link-to-blade attach bolts may be different lengths
and/or have different washers installed under nut for dynamic
balancing. Reinstall hardware as removed.
2. Remove nut and A141-14 washer securing C119-2 bumper to tail rotor gearbox
output shaft.
3. Remove teeter hinge bolt, then slide tail rotor assembly and bumper off of shaft.
NOTE
Protect tail rotor assembly from damage when maintenance is
performed on workbench.
APR 2019 Chapter 64 Tail Rotor Page 64.1