THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 4
Jun 1/03
4F6
55-20-00
4. Balancing
WARNING: ALL CONTROL SURFACES THAT HAVE BEEN REPLACED OR REPAINTED MUST BE
BALANCED BEFORE INSTALLATION.
A. Balancing Equipment (Refer to Figure 2.)
Balancing must be done using a suitable tool capable of measuring unbalance in inch-pounds from
centerline of control surface hinge pin. A suggested tool configuration is shown in 95-00-00,
Figure 2. Other tool configurations may be used, provided accuracy is maintained and recalibration
capability is provided. The tool shown in 95-00-00 may be calibrated by placing it on the control
surface to be balanced with balance points over control surface hinge centerline and balance bar
parallel to cord line. Position trailing edge support to align tool with control surface cord line and
secure in this position. Remove tool without disturbing trailing edge support and balance tool by
adding weight to light end as required. (Movable weight must be at centerline.) Place tool on control
surface perpendicular to hinge centerline. Read scale when bubble level has been centered by
adjustment of movable weight.
B. Balancing Stabilator (Refer to Figure 2.)
To balance stabilator, assembly must be complete including trim tab, tab pushrod and end bearing,
stabilator tips and all attaching screws. Before balancing, tape trim tab in neutral position with a
small piece of tape. Place complete assembly on knife edge supports in a draft-free beam
perpendicular to hinge centerline. Do not place tool on trim tab. Calibrate tool as described in
Balancing Equipment, above. Read scale when bubble level has been centered by adjustment of
movable weight and determine static balance limit. If static balance is not within limits given,
proceed as follows:
(1) If the stabilator is out of limits on the leading edge heavy side, remove balance plates from the
mass balance weight until the static balance is within limits.
(2) If stabilator is out of limits on trailing edge heavy side, add balance plates (4 Maximum) to
mass balance weight until static balance is within limits.
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