NEUTRAL RIG CHECK
Due to accumulation of tolerances,
and static blade loads, the accuracy
of servocylinder piston measurements
noted during rigging of the control
system may not be repeatable on
subsequent neutral rig checks.
Adjust control system rigging as near
nominal as possible. Proper rigging is
proven by a successful maintenance
flight test. If the flight test indicates
that control positions and autorotation
rpm are within tolerance, subsequent
dimensional rigging checks are not
required. If the flight control system
is disturbed dimensionally, the rigging
shall be readjusted within tolerance.
Perform rigging as a continuous step
by step process from the copilot
position. Each adjustment effects
other components, be precise.
Working from forward left work platform, measure
and record length of left servocylinder pistons
Working from forward right work platform,
measure and record length of right servocylinder
Check lengths of piston (12 and 13) measured in
steps 4 and 5. Length shall be 6-1/8 to 6-11/64
inches. If not, rig forward servocylinders (Task
11-54). Repeat steps 4, 5, and 6.