65-20 Tail Rotor Drive Shaft Assembly
Refer to R66 Illustrated Parts Catalog (IPC) Figure 65-3.
A. Removal
1. Remove C023 tailcone assembly per Section 53-40.
2. Refer to Figure 65-1. Remove hardware securing F172-3 (bearing) housing to F193-2
hanger.
3. Refer to Figure 65-3. Using a 3-foot extension, remove bolts securing C041-12
damper assembly arm to D072-1 bulkhead assembly angle. Support forward end of
D224 drive shaft assembly.
4. Remove hardware securing A558-2 cover to tailcone and remove cover.
5. Support aft end of drive shaft, and remove hardware securing drive shaft to aft C947-3
plate assembly, noting hardware removed. Carefully pull drive shaft forward through
tailcone.
B. Installation
1. Refer to Figure 65-1. Route D224 drive shaft assembly through inside of tailcone.
Support drive shaft as required.
2. Install hardware securing drive shaft to aft C947-3 plate assembly, as removed, and
remove support. Standard torque fasteners per § 20-32 and torque stripe per Figure
5-1. Install A558-2 cover.
3. Refer to Figure 65-3. Remove forward A231 (tailcone) plug assembly. Estimate
longitudinal gap (or interference) between C041-12 damper assembly arm and D072-
1 bulkhead assembly angle. If gap (or interference) exceeds 0.12 inch, contact RHC
Technical Support. If gap (or interference) is less than 0.12 inch, verify correct damper
orientation. Using a 3-foot extension, install bolts securing damper to bulkhead angle.
Standard torque bolts per § 20-32 and torque stripe per Figure 5-1. Install plug
assembly.
4. Install hardware securing F172-3 (bearing) housing to F193-2 hanger, and remove
support. Standard torque bolts per § 20-32 and torque stripe per Figure 5-1.
5. Install C023 tailcone assembly per § 53-40.
MAY 2015 Chapter 65 Tail Rotor Drive System Page 65.3
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