2. Control Surface Balancing
T
ool (See Figure 2.)
W
ARNING: ALL CONTROL SURFACES THAT HAVE BEEN REPLACED OR REPAINTED MUST BE
BALANCED BEFORE INSTALLATION.
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 Figure 2. Other tool
configurations may be used, provided accuracy is maintained and recalibration capability is provided.
The tool described in Figure 2 is used as follows:
A. Ensure that the control surface is in its final flight configuration, static wicks, trim tabs, trim tab
pushpull rod and control surface tip (as applicable) should be installed. The surface should be
painted and trim/servo tabs should be in the neutral position.
NOTE: Paint is a considerable balance factor. Remove existing paint prior to repainting a control
surface.
B. Place hinge bolts through control surfaces and place control surface on a holding fixture.
C. Avoiding rivets, place the balancing tool on the control surface with the tool’s hinge centerline
directly over the hinge line of the control surface.
D. Adjust the movable trailing edge support to fit the width of the control surface, then tighten the set
screw on the trailing edge support.
E. Adjust the trailing edge support vertically until the beam is parallel with the control surface
chordline.
F. Remove the tool from the control surface and balance the tool itself by adding or removing nuts or
washers from the beam balance bolt. When balancing the tool, the movable weight must be at the
bar’s hinge centerline.
G. After balancing tool, reattach it to the control surface, but keep the beam positioned 90 degrees
from the control surface hinge line.
H. Determine balance control surface by sliding movable weight along the balance beam.
I. Read the scale when the bubble in the level has been centered. Since the movable weight weighs
threepounds, every inch it is moved from the center of the beam equals three inch-pounds of force.
3. Baggage Door Lock Tool
A suitable tool can be fabricated as shown in Figure 3.
4. Aileron Bellcrank Rigging Tool
A suitable tool can be fabricated as shown in Figure 4.
5. Rudder Rigging Tool
A suitable tool can be fabricated as shown in Figure 5.
6. Flap Rigging Tool
A suitable tool can be fabricated as shown in Figure 6.
7. Stabilator Rigging Tool
A suitable tool can be fabricated as shown in Figure 7.
THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 2
Feb 19/04
5L8
95-00-00
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