Hangar 9 Piper Pawnee 40 ARF Assembly Manual page 18

Section 2: Aileron and Flap Servo Installation
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Step 8
Apply 2–3 drops of thin CA into each of the holes to
harden the surrounding wood. This will make the screws
more secure and prevent them from vibrating loose.
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Step 9
Use the screws supplied with the servo and a #1 Phillips
screwdriver to secure the servo to the mounting blocks.
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Step 10a (aileron servos only)
Remove the supplied servo arm from the aileron servo.
After centering the servo, attach a standard double arm
using the screw supplied with the servo. Use side cutters
to remove the portion of the arm that does not extend
beyond the servo cover.
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Step 10b (flap servos only)
Remove the supplied servo arm from the flap servo. After
centering the servo, attach a long servo arm (JSP98060)
using the screw supplied with the servo.
Note: When installing the horn on the
flap servo, set the throw on the radio
to the center position for the flaps.