Systems Guide

Aerosoft
Airbus A320/A321
SYSTEMS
Systems guide
Vol
4
04-03-21
28 October 2014
COMMON MODES
COMMON modes are combinations of vertical and lateral modes.
COMMON MODE
VERTICAL
LATERAL
TAKE OFF
Mode: Pitch Take off
FMA: SRS
Mode: Runway LOC or Runway Track
FMA: RWY or RWY TRK
ILS APPROACH
Mode: G/S* or G/S
FMA: LAND or FLARE or ROLL OUT
Mode: LOC* or LOC
FMA: LAND or FLARE or ROLL OUT
NON ILS APPROACH
Mode: Final Descent
FMA: FINAL
Mode: Nav
FMA: APP NAV
GO AROUND
Mode: Pitch Go Around
FMA: SRS
Mode: Go Around track
FMA: GA TRACK
TAKE OFF: SRS
This mode is available during take off and the first 5 seconds of flight. In SRS mode the aircraft will follow pitch
guidance at speeds defines by the speed reference guidance law.
ENGAGEMENT CONDITIONS
 V
2
is inserted in MCDU
 Slats are extended
DISENGAGEMENT CONDITIONS
 Manually by engaging any other vertical mode
 Automatically at acceleration altitude
GUIDANCE
 The aircraft will keep V
2
+ 10 knots
 An attitude protection will prevent a too high nose up during take off
 Flight path angle of minimum climb rate of 120 ft/min
TAKE OFF: RUNWAY
The RUNWAY mode will provide lateral guidance during take off and immediately thereafter using the LOC signal
(when it is available. The RUNWAY TRK mode will provide lateral guidance on an extended runway center line.
ENGAGEMENT CONDITIONS
 SRS engagement conditions
 LOC signal received
 Aircraft heading within 20 degrees of runway heading