62-42 Dents (continued)
CAUTION
Do not repair any dent that has a sharp cut or break in the
skin. If necessary, locally penetrant inspect, keeping penetrant
materials away from bond joints.
A. Skins and Doublers
1. Refer to Figure 62-11. Smooth, round bottom dents with 0.060 inch minimum
radius that occur in honeycomb and unsupported areas of the blade as listed
below may be repaired when damage does not exceed the following limits:
a. 0.125 inch maximum depth dent between RS 162.90 and RS 196.50
b. 0.090 inch maximum depth dent between RS 124.00 and RS 162.90.
c. 0.030 inch maximum depth dent between RS 70.00 and RS 124.00.
d. Maximum area of any dent or dents is 12 square inches and maximum length
is 2.0 inches between RS 70.00 and RS 162.90.
e. Maximum area of any dent or dents is 24 square inches and maximum length
is 4.0 inches between RS 162.90 and RS 196.50.
f. Replace blade with any dent in 0.7 inch area immediately aft of skin-to-spar
bond line.
g. For dents in skins and/or doublers inboard of RS 70.00, contact RHC for
repair procedures.
2. Refer to Part C for leading edge cap damage. Refer to § 62-50 for repair procedures
for damage within limits.
B. Trailing Edge Bond Joints
1. Refer to Figure 62-12. Verify damage does not result in an edge void and does
not exceed the following limits:
a. 0.030 inch maximum damage between RS 70.00 and RS 124.00.
b. 0.060 inch maximum damage between RS 124.00 and 198.00.
c. Refer to Part A, step 1(d).
2. Refer to § 62-50 for repair procedures for damage within limits. Blend out dents
in trailing edge bond joints with a 0.10 inch blend radius.
C. Leading Edge Cap
1. Verify damage does not result in a crack or tear and dent depth does not exceed
0.020 inch.
2. Dents do not require blending or filling. Dents may be blended with a 0.10 blend
radius.
APR 2019 Chapter 62 Main Rotor Page 62.21
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