Systems Guide

A318/A319/A320/A321
Professional
SYSTEMS
Systems guide
Vol
4
04-03-37
11 July 2018
• The GEN pbs (GEN 1 & GEN 2) are dark in AUTO mode. FAULT will show when the generator is
inoperative, or the engine is not running. When pushed OFF will show and the generator will be
disconnected from the AC bus.
• The APU GEN pb is normally in the ON position (lights off) and the generator will be available
when the APU is running. When there is a problem FAULT will show. When pushed OFF will
show and the APU generator will be taken offline.
• The BUS TIE pb is normally in the AUTO position (lights off) and will activate when needed. When
pushed OFF will show and the buses will NOT interconnect.
EQUIPMENT
Most functions and systems are controlled by push-button switches with integrated (light) indications that
follow the ‘light out’ principle:
• No light: system functioning normal
• Green: normal operation
• Blue: normal operation of temporary used system
• White: abnormal operation / test
• Red: failure, needs immediate action
• Amber: failure, needs attention
During normal operation only, green lights can be illuminated permanently, blue lights are possible if not
permanently lit. Button positions:
• PRESSED IN: on, automatic, normal, open
• RELEASED OUT: off, manual, alternate, shut down
A push button that shows two dots is only partially used.
FLIGHT CONTROLS
GENERAL
The Sidesticks are used to control pitch and roll. The input from the pilot is interpreted by the flight
computers and these move the flight controls. The flight computers however will ignore any input that
would cause excessive maneuvers or would put the aircraft outside the safe flight envelope.
The flight control surfaces are electrically controlled and hydraulically activated.
COCKPIT CONTROLS
• Two side stick controllers for pitch and roll (these are not mechanically connected)
• Two pairs of pedals (interconnected) that mechanically control the rudder
• A speed brake control lever
• Two hand wheels to mechanically control Trimmable Horizontal Stabilizer (THS)
• A switch to control rudder trim
• A tiller that is used to steer the aircraft at low speed on the ground (note this is animated but
cannot be used to steer.)
Note there is no aileron trim control.