REPAIR CONTROL ARMS AND BELLCRANKS
Medium Helicopter Repairer
This does not apply to bearing or
Damage to bores or holes must not be more than
0.015 inch in depth and must not be more than 5
percent of the load bearing surface.
Remove surface scores, tool marks, or corrosion
pits by burnishing. Depth after burnishing must
not be more than 10 percent of thickness or
0.040 inch, whichever is less. An area of 20
times damage depth may be burnished. If
damage is close to fillets, radii, holes, or edges,
burnish a greater area.