5-32 Push-Pull Tubes
1. Nicks, cuts, or scratches in tube not more than 0.010 inch deep and not more than
1/4 of tube circumference may be polished out in lengthwise direction using 320-grit
or finer wet-or-dry abrasive paper to 1 inch minimum blend radius. Replace push-pull
tube if depth exceeds these limits.
2. Replace push-pull tube if tube is dented or flattened more than 5% of its diameter in
unswaged area; dents or flattening is not permitted in swaged (tapered and threaded)
ends of tubes.
5-33 Rod Ends and Spherical Bearings
1. Maximum axial play: 0.020 inch
Maximum radial play: 0.010 inch
2. Looseness between bearing outer race and rod end housing is not permitted.
3. Rod ends not riveted in place must block passage of 0.020-inch diameter wire through
witness hole. Refer to Figure 5-1 for maximum rod end extension when no witness
hole is provided.
4. Rod end jam nuts and palnuts must be torqued per § 20-32 and torque striped per
Figure 5-1 at the most visible position for pre-flight inspection. Torque stripe must
extend across nuts to both rod end shank and push-pull tube (or pitch link barrel,
yoke, support, strut, etc.). Torque stripes are subject to deterioration and must be
periodically renewed.
5. Refer to Figure 5-2. Rod ends must be centered, or positioned, to allow as much push-
pull tube or link rotational movement as possible without binding.
CAUTION
Teflon-lined bearings must not be lubricated or solvent cleaned.
WARNING
Assembly of flight controls is critical and requires inspection
by a qualified person. If a second person is not available,
RHC recommends the installer take a 5-minute break prior to
inspecting flight control connections he has assembled.
JUL 2020 Chapter 5 Inspections Page 5.3
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