Autobrakes and Antiskid
Antiskid Protection
Antiskid protection is provided in the normal and alternate brake systems.
The normal brake hydraulic system provides each main gear wheel with individual antiskid
protection. When the system detects a skid, the associated antiskid valve reduces brake
pressure until skidding stops. The alternate brake hydraulic system works similar to the
normal system however antiskid protection is applied to main gear wheel pairs instead of
individual wheels.
Both normal and alternate brake systems provide skid, locked wheel, touchdown and
hydroplane protection.
Antiskid protection is available even with loss of both hydraulic systems.
Autobrake System
The autobrake system uses hydraulic system B pressure to provide maximum
deceleration for rejected takeoff and automatic braking at preselected deceleration rates
immediately after touchdown.
The Autobrake system operates only when the normal brake system is functioning.
Antiskid system protection is provided during autobrake operation.
