53-41 Inspection and Repair
This procedure outlines the inspection criteria and repair limits for the tailcone assembly.
Repairs are limited to blending out scratches and renishing skins. Contact RHC Technical
Support if allowable damage is exceeded.
A. Scratches
1. Refer to Figure 53-5. Verify damage does not exceed the following limits:
a. 0.005 inch maximum scratch depth more than 15° from tailcone centerline.
b. 0.010 inch maximum scratch depth less than 15° from tailcone centerline.
2. If damage exceeds limits, return tailcone assembly to RHC for repair. If damage is
within limits, blend out scratches with a 0.10 inch minimum blend radius. Refinish
skins using approved materials per Section 20-70.
B. Dents
1. Refer to Figure 53-5. Smooth, round bottom dents with 0.125 inch minimum radius
without sharp nicks or cracks are acceptable when damage does not exceed the
following limits:
a. 0.030 inch maximum dent depth.
b. 1.250 inch maximum dent diameter.
c. One dent permitted per tailcone station (inch).
d. 4.000 inch minimum distance between dented tailcone stations.
2. If damage exceeds limits, replace tailcone or return to RHC for repair.
25 OCT 2010 R66 Maintenance Manual Chapter 53 Fuselage Page 53.15
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