Robinson Helicopter Company RTR 660, Maintenance Manual

Page: 421 / 542

25 OCT 2010 R66 Maintenance Manual Chapter 67 Flight Controls
Page 67.3
67-11 Cyclic Control Assembly (continued)
A. Removal (continued)
5. Remove hardware securing C121-1 push-pull tube assembly to D320-8 stick
assembly. Remove hardware securing C319-5 torque tube assembly to C177-5
pivot assembly. Move push-pull tube and torque tube assemblies aft, and protect
from scratching.
6. Disconnect, but do not remove, two bolts securing cyclic friction assembly to cabin.
Apply some cyclic friction to keep plates assembled.
7. Remove screws securing F338-1 cyclic box to cabin. Lift and remove cyclic control
assembly with attached cyclic box and friction assembly. Install nuts onto two
cyclic friction assembly bolts, hand tight, to retain bolts and spacers.
8. Remove hardware securing both outboard, vertical F121-5 push-pull tube assemblies
and C130-47 spacer to D696-6 yoke assembly.
9. Remove hardware securing center, vertical F121-7 push-pull tube assemblies to
C958-6 bellcrank.
10. Remove hardware securing G205-1 fork assembly to F334-1 support assembly.
11. Pull D175-5 cyclic pivot assembly (torque tube, yoke, bellcranks, fork, and push-pull
tube assembly) aft through belly.
B. Installation
1. Refer to Figure 67-1. Verify center-to-center distance between rod end and spherical
bearings in G205-5 fork is 5.40 ± 0.03 inches; adjust as required. Standard torque
jam nut and palnut per Section 20-32. Install C175-5 cyclic pivot assembly (torque
tube, yoke, bellcranks, fork, and push-pull tube assemblies) thru aft belly.
2. Connect G205-1 fork assembly to F326-1 bellcrank and standard torque bolt per
Section 20-32.
3. Connect lower end of center F121-7 push-pull tube to C958-6 bellcranks and standard
torque bolt per Section 20-32.
4. Connect lower ends of both outboard F121-6 push-pull tubes to D696-6 yoke using
a NAS6605-46 bolt and C130-47 spacer and standard torque per Section 20-32.
Install plastic hole plug in vertical keel panel beneath RH, aft seat.
5. Remove temporary nuts from cyclic friction assembly bolts. Position cyclic box
with attached cyclic control and friction assemblies between keel panels. Install all
screws fastening cyclic box to cabin. Fasten cyclic friction assembly to cabin and
standard torque bolts per Section 20-32.
6. Connect C319-5 torque tube assembly to C177-5 pivot and standard torque bolts
per Section 20-32.
7. Connect forward end of C121-1 push-pull tube to D320-8 cyclic stick and standard
torque bolts per Section 20-32.