53-53 Tail Rotor Guard
Refer to R66 Illustrated Parts Catalog (IPC) Figures 53-25 and 53-29.
A. Removal
1. Refer to Figure 53-7. Loosen two (forward) fasteners securing D081-2 block and
D079-1 guard assembly to C043-1 lower vertical stabilizer.
2. Remove hardware securing guard to D082-1 tube assembly. Slide guard off of
tube, then forward through blocks. Remove D081-1 spacer from tube.
B. Installation
CAUTION
Do not install D079-1 revision U or prior tail rotor guard assembly
on R66 helicopters.
1. Refer to Figure 53-7. Loosen two (forward) fasteners securing D081-2 block to
C043-1 lower vertical stabilizer, if not previously accomplished. Insert D079-1
guard assembly aft through blocks.
2. Lightly coat retaining hardware and mating surfaces of D082-1 tube assembly and
D079-1 guard assembly with approved primer per § 20-70, prior to installation.
3. Install D081-1 spacer inside tube. While wet with primer, slide guard onto tube
and install hardware. Standard torque bolts per § 20-32, and torque stripe per
Figure 5-1. Seal around end of guard with primer after assembly.
4. Verify D081 blocks clamp guard sleeve. For proper guard-to-stabilizer clamping,
first standard torque (forward, top) NAS1351-4-53P screw and associate hardware
per § 20-32, then special torque (forward, bottom) NAS1352-3-14P screw and
associate hardware per § 20-33. Torque stripe fasteners per Figure 5-1.
MAY 2015 Chapter 53 Fuselage Page 53.21
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