BOMBARDIER SD3-60 Maintenance Manual

RUDDER PRIMARY CONTROLS DESCRIPTION & OPERATION
27-21-00 AMM 10.0.0.0
Description
1.
A. General
Refer to Figure 1. Rudder movement is controlled by a system of push/pull rods and levers
which directly connect the rudder bars on the pilots floor with an operating lever on the torque
tube at the bottom of each rudder.
The rudder is provided with a trim tab and an associated control system.
pb1. The tab also acts in a geared capacity i.e. it responds to assist primary surface
movement.
B. Rudder circuit
Refer to 27-21-01,
transmitted via a vertical torque tube which is coupled to the bottom of the left rudder
pedestal assembly.
The torque tube is provided at the bottom with an output lever from which a series of control
rods (inter-connected by lever assemblies positioned as shown) are routed aft below the
main cabin floor, then up the fuselage left sidewall at frame 315.19 and thence through the
roof structure to connect with the rudder operating lever.
C. Rudder stops
The travel range of the rudders is determined by the setting of adjustable primary stops on
each rudder pedestal assembly. When the primary stops take effect, a clearance exists at the
corresponding secondary stop mounted on the torque tube assembly at the bottom of the
rudder.
The adjustable secondary stops are set to contact resilient buffers on brackets fitted to each
vertical stabilizer when the design travel limit beyond that determined by the related primary
stops is reached.
EFFECTIVITY: All
SD3-60 AIRCRAFT MAINTENANCE MANUAL
pb1. Pedal movement on the interconnected rudder pedestals is
Refer to 27-22-00,
27-21-00
z
Page 1
Jun 30/01