CHAPTER 27
PAGE 17
PAGE DATE: 21. March 2014
MAINTENANCE MANUAL EXTRA 300LT
27-20-00 RUDDER CONTROL
(Refer to Figure 14) The rudder pedals (1) are connected via
a cable system (2) to the bottom hinge bellcrank (3). The
cables are guided by fairleads (6). Springs (9) keep the
cables under tension when they are not operated. The rear
pedals are electrically adjustable. The rudder (4) is mounted
at three points in spherical bearings pressed into a alu-
minium hinge resp. into aluminium hinge arms. For lightning
protection reasons each hinge (arm) is grounded to the
corresponding attachment bracket at the rudder by bonding
leads. A travel stop plate is located at the bottom hinge
bracket. A second safety stop is located at the rudder pedal
bearing having the only purpose of protecting the lower
brake system fitting in case of rudder cable failure.
I M P O R T A N T This second stop must not be reached under normal
operation conditions. Misallignment or exessive elon-
gation of the rudder cabels will result in misuse of this
second stop and a subsequent overload of the rudder
bearing. A subsequent inflight failure of the footrest
could occur.
To prevent flutter the rudder is mass balanced. The mass
balance weight of the rudder is installed in the rudder horn.
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