Balancing Aileron - Piper Arrow IV Turbo Maintenance Manual

CHECKING AILERON FREE PLAY.
The following checks are recommended before balancing to ascertain the amount of "free play" in the
aileron:
Set the aileron in its neutral position and secure. Obtain a straightedge long enough to extend from the
ground up to a few inches above the aileron trailing edge. Place the straightedge next to the aileron trailing
edge and gently move the aileron up and down, mark the limit of travel (free play) on the straightedge. The
overall travel (free play) must not exceed 0.24 of an inch. Should free play exceed the limit stated make
necessary repairs as required to eliminate excessive free play. Grasp the aileron and move it spanwise
(inboard/outboard) to insure maximum end play of .035 is not exceeded.
BALANCING AILERON. (Refer to Figure 57-3.)
Position the aileron on the balancing fixture in a draft free area and in a manner which allows unrestricted
movement of the aileron. Place the tool on the aileron, avoid rivets and keep the beam perpendicular to the
hinge centerline. Read the scale when the bubble level has been centered by adjustment of the movable weight
and determine the static balance. If the static balance is not within the limits specified in Figure 57-3, proceed
as follows:
1. Leading Edge Heavy: This condition is highly improbable; recheck measurements and calculations.
2. Trailing Edge Heavy: There are no provisions for adding weight to balance weight to counteract a
trailing edge heavy condition; therefore, it will be necessary to determine the exact cause of the unbalance. If
the aileron is too heavy because of painting over old paint, it will be necessary to strip all paint from the
aileron and repaint. If the aileron is too heavy resulting from repair to the skin or ribs, it will be necessary to
replace all damaged parts and recheck the balance.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
Figure 57-3. Aileron Balance Configuration
2K11
57-50-04
Page 57-10
Revised: August 8, 1984