INSTALLATION OF AILERON (figure 57-2)
1. Install balance arm into opening in outboard rib by moving inboard end of aileron forward to allow
arm to be inserted through opening. Move aileron into place and install attaching screws and nuts.
Ensure that aileron is free to move without interference.
2. Attach aileron control rod with bolts, washers, and nut. Divide washers so that aileron is free to rotate
from stop to stop without control rod binding or rubbing on opening in aft spar. Be certain that rod end
bearing has no side play when tightening bolt and that rod does not contact side of bracket.
3. Actuate aileron controls to ensure freedom of movement.
CHECKING AILERON FREE PLAY
The following checks are recommended before balancing to check the amount of free play in the aileron:
1. Set aileron in its neutral position and secure.
2. Obtain a straightedge long enough to extend from ground up to a few inches above aileron trailing
edge.
3. Place straightedge next to aileron trailing edge and gently move aileron up and down, mark limit of
travel (free play) on straightedge.
4. The overall travel (free play) must not exceed 0.24 of an inch. If free play exceeds limit, make
necessary repairs to eliminate excessive free play.
5. Grasp aileron and move it spanwise (inboard/outboard) to ensure maximum end play of 0.035 is not
exceeded.
BALANCING
BALANCING AILERON (figure 57-3) PPS5001
Balance aileron as follows:
1. Position aileron on balancing fixture in a draft free area and in a manner allowing unrestricted aileron
movement.
2. Place tool on aileron. Avoid rivets and keep beam perpendicular to hinge centerline.
3. Read scale when bubble level has been centered by adjustment of movable weight and determine static
balance.
4. If static balance is not within limits specified in figure 57-3, proceed as follows:
a. Leading Edge Heavy: This condition is highly improbable; recheck measurements and
calculations.
b. Trailing Edge Heavy: There are no provisions for adding weight to balance weight to counteract a
trailing edge heavy condition. It is necessary to determine exact cause of unbalance.
(1) If aileron is too heavy because of painting over old paint, strip all paint from aileron and
repaint.
(2) If aileron is too heavy resulting from repair to skin or ribs, replace all damaged parts and
recheck balance.
BALANCING EQUIPMENT AND PROCEDURE (figure 57-3)
Balancing must be done using a suitable tool capable of measuring unbalance in inch-pounds from hinge
pin center line of control switch. A suggested tool configuration is shown in chapter 95.
57 - 51 - 00
Page - 57-10
Reissued: August 1, 1986
2G23
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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