Operation Manual Part 2

Aerosoft – Digital Aviation
CRJ-70 & CRJ-900
AOM PART 2
Systems Description
VOL
5
5-1-85
26-Jul-2017
ANTI-SKID
The anti-skid-system controls the hydraulic pressure applied to the wheel brakes and performs the following
functions:
- Prevent skidding
- Protection during touchdown – even though the brake pedals may be pressed / applied, a landing with
locked wheels is prevented
- Recovering of a wheel from deep skid
The anti-skid-system comprises four-wheel speed transducers and two dual anti-skid control valves.
It may only be activated when both main gears are locked in the down position and the parking brake is not
activated. The anti-skid switch needs to be switched to the ARM position and the system becomes operation
automatically as soon as passing 35 knots on ground (weight-on-wheels signal is present).
As soon as the aircraft is in the air (and there is no weight-on-wheels signal) brake pressure is dumped to
prevent a landing with locked wheels.