Piper PA-44-180 SEMINOLE Maintenance Manual page 602

BALANCING RUDDER. (Refer to Figure 55-5.)
1. Insure that the control surface is in its final flight configuration, static wicks, trim tabs, trim tab push-pull
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.
Because paint is a considerable balance factor, it is recommended that existing paint
be removed prior to repainting a control surface.
2. Place hinge bolts through control surfaces and place control surface on a holding fixture.
3. 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.
4. Adjust the movable trailing edge support to fit the width of the control surface. Tighten the set screw on the
trailing edge support.
5. Adjust the trailing edge support vertically until the beam is parallel with the control surface chord line.
6. Remove the tool from the control surface and balance the tool itself by adding or removing nuts or washers
from the beam balancing bolt. When balancing the tool, the movable weight must be at the bar's hinge
centerline.
7. After balancing the tool, reattach it to the control surface. Keep the beam positioned 90° from the control
surface hinge line.
8. Determine balance of control surface by sliding movable weight along the balance beam.
9. Read the scale when the bubble in the level has been centered . Since the movable weight weighs three
pounds, every inch it is moved from the center of the beam equals three inch-pounds of force.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
— Note —
— END —
3B17
PPS50011-2
5 5 - 4 3 - 0 1
Page 55-08
Revised: May 15, 1989