INSTALL ROTARY-WING BLADE
Check nuts (20 and 20.1) for correct engagement
with pin (18) as follows:
Check that the end of the pin (18) protrudes a
minimum of 0.05 inch beyond the face of the
upper nut (20.1). This permits two threads
submerged below the face of upper nut.
Check that the lower end of pin (18) protrudes
a minimum of 0.22 inch beyond the face
of the lower nut (20). This permits the first
thread on the pin to be flush with the face
of the lower nut.
If nut engagement in steps a and b is not
within limits, replace pins or blades as