There are a number of actuation units, besides the primary and secondary fight control, there are 3 The secondary controls available to give the pilot finer control over flight or to ease the workload. They include wing flaps, slats, spoilers, air brakes and variable-sweep wings. pitch, roll and yaw control, basically obtained by deflection of elevators, ailerons and rudder (and combinations of them) The secondary fight control (blue, for color print) indicated in blue for the secondary flight control: high-lift and lift-dump devices, airbrakes, tail trimming, etc 2.2 Aircraft has a number of different control surfaces: The primary flight control (Red, for colour print), i.e. 3 and 4 show the classic layout for a conventional airliner. The number and type of aerodynamic surfaces to be controlled changes with aircraft category. Roll вЂ“ Ailerons Yaw вЂ“ Rudder Pitch вЂ“ ElevatorsДЄ further evolution of the servo-assisted control is the fly-by-wire technique, based on signal processing of the pilotвЂ™s demand before conversion into actuator control. The primary fight control is the ailerons, elevators, and rudder.ДЇig 4 вЂ“ A simplified diagram for Flight control surfaces on airliner Secondary Flight Control refers to control of aircraft flight other than Primary Flight Control.ДЇig 3: The primary and secondary fight control surface 2 The above are called Primary Flight Control. Roll(along Y axis) pitch (along X axis) yaw (along z axis). If the aircraft wishes to head into a new direction, it must make a turn (or a roll) on one of the X, Y, aor Z axis.

The various control related to the fight systemДЇig 2: The X-Y-Z 3D view of aircraft flight xДЄircraft flies on a 3D terrain (X, Y, and Z) The following will x x xДЇlight Control Linkage Hydraulic Components Environmental ControlДЇig 1. Without these parts, the airplane will not be able to leave the ground.Д«esides the electric system to provide the electrical energy discussed before, there are fight control system. In this topic, we will concentrate on the fight related control electrical unit. Due to the complexity, each of its function can be classified as a вЂњsystemвЂќ.Д«asically, The electrical system based on electrical power or electronic control and with mechanical and other control units, we will focus more on the electrical and control parts. This section will introduce some of its functions. Modern aircraft is a complex machine with a lot of electrical, electronic, mechanical, hydraulic or a combination of them. If you have any questions about this Service Bulletin, contact your Duncan Aviation Citation Tech Rep.Introduction to Aircraft Design and Aviation Systems (ENG3005)

Installing the larger diameter pulleys is an optional item and currently it is found only as a note in the IPC and can be easily overlooked.ДЄlthough this adds some labor and parts to the job, in the end we feel that installing the larger pulleys with the new cable ensures that the system is improved to the best possible design.

This larger pulley will relieve the bend radius of the cable which, when combined with the new cable, can improve the longevity of the cable. This pulley is a larger diameter which makes it necessary to also replace the mounting brackets. Although this new cable is an improved design, there is an additional item that can be accomplished to improve the Flight Control system.Д¬essna now also has a new pulley available for the aft location where the cables make the 90 degree turn out to the trim actuators. Many Cessna aircraft have already replaced these cables during normal maintenance with the newest cables available, due to cable fraying. Recently, Cessna released Mandatory Service Bulletin SB560XL-27-34, which calls for the inspection or replacement of the aft elevator trim cables. Cessna Mandatory Service Bulletin SB560XL-27-34: Aft Elevator Trim Cable May 2012

Cable and pulley flight control system