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18.2 After balancing the rotor blades, and before reinstalling them in the blade grips, check the security
of the bolts that mount the blade grips and bearings to the feathering/spindle shaft. This will require
the use of two 1.5mm hex drivers, one on each side.
18.3 After confirming that the bolts are secure, reinstall the main rotor blades, mounting bolts and
nuts in the blade grips. The bolts for securing the blades should be tightened so that the blades
can pivot in the grips when moderate pressure is applied. Never allow the main blades to swing
freely in their grips.
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