64-30 Tail Rotor Blade Inspection and Repair
This blade repair procedure outlines the repair limits, methods and materials used for
repairing tail rotor blades. Repairs are limited to blending out scratches, dents, nicks,
removing corrosion, and refinishing the blades. The inspections, repairs and limitations
contained herein refer to damage sustained in service, including damage during shipping
and handling (manufacturing irregularities are treated separately by the factory). In-service
damage will generally exhibit paint scuffing or scratches and often times freshly-exposed
metal in the form of scratches in the finish. If there are any questions as to the possibility
of a manufacturing irregularity, contact RHC Technical Support.
CAUTION
A blade may be repaired more than one time. However, in no
case can more than the maximum material be removed or the
maximum dent depth be exceeded in any one location.
Refer to § 62-40 for measuring blade damage.
64-31 Scratches and Corrosion
1. Refer to Figure 64-4. Verify damage does not exceed the following limits:
a. 0.008 inch maximum damage between RS 18.00 & RS 28.43 (F029-2) or RS
30.00 (F029-1).
b. 0.005 inch maximum damage more than 15° spanwise between RS 18.00 & inboard.
c. 0.008 inch maximum damage less than 15° spanwise between RS 18.00 & inboard.
2. Refer to § 62-50 (main rotor) for repair procedures for damage within limits. Blend out
scratches or corrosion on skins with a 0.10 inch blend radius.
APR 2019 Chapter 64 Tail Rotor Page 64.11
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