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Honda Aircraft Company
HA-420
SYSTEMS
POM
DESCRIPTION
automatic antiskid function resumes its standby mode after any wheel
skid stops or brake pedal pressure is decreased below the wheel skid
threshold level. Power brakes will still be available if the antiskid system
fails.
Touchdown protection prevents brake application until wheel spin-up
occurs. After weight-on-wheels has been true for three seconds, power
braking is enabled with or without a wheel speed signal.
Locked wheel crossover protection starts if either wheel slows
significantly below the speed of the other when aircraft speed is above
25 kts. When the sensed speed of either main landing gear wheel slows
to 30% or less when compared to the other wheel speed, a full brake
release occurs which removes the locked wheel condition.
Wheel spin-down braking applies minimum wheel braking pressure
during landing gear retraction to insure that the main landing gear wheels
have stopped rotating before they retract into the wheel well.
Emergency/Parking Brake
The emergency/parking brake system is a mechanically actuated power
brake valve that meters brake pressure to both brakes in proportion to the
emergency/parking brake handle movement.
Parking brake function is supplied by locking the emergency/parking
brake handle at the parking position.
The emergency/parking brake system has a thermal relief valve to
prevent over-pressurization of the hydraulic tubes and brake assemblies
when there is a change in thermal environment.
HJ1-29000-005-001
October 30, 2016
1-128
FOR TRAINING PURPOSES ONLY
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