CHAPTER 27
PAGE 12
MAINTENANCE MANUAL EXTRA 300/SC
PAGE DATE: 1. August 2014
27-10-00 AILERONS
Description and Operation
(Refer to Figure 10) The aileron (1) is direct mechanical
linked to the control stick (3) by the aileron center linkage
(7) with spade arm, push-pull rods (4), bellcranks (5-6) and
the torque tube (2). The bell cranks have two sealed ball
bearings. Each aileron is mounted at four points in spherical
bearings. For lightning protection reason each hinge arm is
grounded to the corresponding attachment bracket at the
aileron by bonding leads. The rod end bearings of the push-
pull rods located in the wing are also interconnected by
bonding leads. The travel stops are located at the torque tube.
To reduce pilot's hand forces the ailerons are equipped with
spades. The hinge line of the ailerons is positioned at 25% of
the aileron chord. In addition a shielded horn balance of 55%
wing chord is provided at the tip of the aileron with a span
of 250 mm.
Two access panels are located at the bottom surface of each
side of the wing.
Removal/Installation
1 Disconnect the actuator rod from the aileron linkage.
2 Loosen the hinge bolts and the ground bonding leads and
remove the bolts.
3 Install in reverse sequence of removal. Observe the second
Note of Chapter 27-00-00 and Figure 4.
Rigging
Before beginning any adjustments inspect control rods,
levers and hinges for signs of wear or damage, check if the
control rod lengths correspond with the measurements given
in Chapter 27-00-01. If necessary replace parts and correct
lengths.
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