Systems Guide

Aerosoft
Airbus A320/A321
SYSTEMS
Systems guide
Vol
4
04-03-55
28 October 2014
MASTER CAUTION, MASTER WARNING & AUTOLAND WARNING
The MASTER WARN pb and MASTER CAUT pb alert the pilot to a problem in one of the systems or an unsafe
condition. The MASTER WARN pb is accompanied by a continuous chime while the MASTER CAUT pb only sounds
a single chime. When pushed the caution and warning system is reset.
NAVIGATION
The navigation system has the following main components
 Navigation receivers
 Radar altimeter, transponders
 Two ADIRS
 Two FMGCs
Pilot interaction with these system uses:
 Multifunction Control and Display Units (MCDUs),
 Flight Control Unit (FCU)
 Transponder control panels
 ADIRS control panel
 Radio Management Panels (RMPs)
ADIRS
The Air Data Inertial Reference
System supplies data such as baro
altitude, speed, angle of attack,
temperature, attitude, track,
heading, acceleration and aircraft
position. The Inertial Reference
System uses three separate units to
determine its position, and these
have to be aligned before the
aircraft is moved.
 The ON BAT light will be
illuminated when one or more IRS is supplied only by the aircraft battery; it will also light up for a short
while at the beginning of alignment.
 The IR pb sw will display OFF when the system is not connected to the other systems and FAULT when
the when IRS alignment is lost.
 The three rotary mode selectors will switch between OFF, NAV (normal mode or operation) and ATT (not
simulated).
 The ADR pb sw can be pushed to disconnect one or more of the systems (OFF) and will display FAULT
when the ECAM systems detected a fault in the Air Data Reference data.
Note: There are differences in setup of ADIRS systems between Airbus models and even airlines, this also means
there are slight differences in how the ADIRS is being used.
RADIO NAVIGATION