Systems Guide

A318/A319/A320/A321
Professional
SYSTEMS
Systems guide
Vol
4
04-03-23
11 July 2018
The RUNWAY mode will provide lateral guidance during takeoff 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
DISENGAGEMENT CONDITION
• Loss of LOC signal
• Any other lateral mode selected
GUIDANCE
The RWY mode will guide the aircraft as close as possible to the center runway line and on an extended
runway line in flight in the RWY TRK mode.
APPROACH: ILS APPROACH
ARMING CONDITIONS
• Aircraft over 400 ft AGL
• ILS approach is selected
• ILS and RA are available
• GA or FINAL mode not selected
DISARMING CONDITIONS
• Depressing the APPR pb (both LOC and G/S mode will disarm)
• Depressing the LOC pb (only G/S will disarm)
• Go AROUND mode selected
• Disengaging AP
ENGAGEMENT CONDITIONS
• Radio Altimeter active
• LOC* and G/S* mode engage