Systems Guide

A318/A319/A320/A321
Professional
SYSTEMS
Systems guide
Vol
4
04-03-54
11 July 2018
MAIN WHEEL BRAKES
The brakes are operated by the brake pedals or the autobrake system via the Green hydraulic system.
Temperature sensors in each main wheel display the temperature on the ECAM WHEELS page. Takeoff is
not allowed before the brakes are below 300°C.
ANTI-SKID
The anti-skid system operates when wheel skid is detected and will provide maximum brake efficiency.
The system is always active, when running from an alternate source it might not be available.
AUTOBRAKES
The autobrake system has three settings. LOW, MED or MAX selected by pbs. ON will show on the
selected setting. When the aircraft is close to the selected rate a green DECEL will show. Pressing the
illuminated pb deactivates the system. Green hydraulic pressure has to be available and the A/SKID & NW
STRG needs to be active. The brakes are activated by spoiler extension.
BRAKE-FAN
The brake fans provide additional cooling when the brakes are overheating (amber temperature
displayed). Activate them during taxi.
LANDING GEAR LEVER AND INDICATOR PANEL
The landing gear lever controls extension and retraction. The three indicator lights will be off when the
gear is up and show red UNLK when the gear is in transit. Three green triangles will show the gear is down
and locked. Next to the gear lever is a red arrow that will light when the gear is not extended, and the
aircraft is in landing configuration. When the two-position Gear Lever is moved, and speed is below 260
knots
• Landing gear doors open,
• Gear will move to the new position
• All doors close
ECAM WHEEL PAGE
The ECAM WHEEL page shows indications for landing gear, brakes and anti-skid system. It is shown
automatically on the ground with engine running before takeoff and in flight when gear is commanded,
and in case of any abnormal indications.
ACCU-PRESS/BRAKE GAUGE
The ACCU PRESS gauge shows the Yellow accumulator pressure (top indication) and the Yellow hydraulic
pressure applied to the brakes (two lower indications). When brakes are applied the pressure, increase
will be shown here.