Wheels And Brakes - Honda HondaJet HA-420 Pilots Operating Manual

Honda Aircraft Company
HA-420 SYSTEMS
POM DESCRIPTION

WHEELS AND BRAKES

Main Landing Gear Wheel and Tire Assembly
A single 17.5 x 5.75 R9, tubeless, radial tire with a speed rating of 190
mph (165 kts) is mounted on each MLG. If the brakes become
overheated, three fusible plugs on the wheel will melt to decrease the tire
pressure.
Nose Landing Gear Wheel and Tire Assembly
The single nose tire is a 16 x 4.4 R8, tubeless, radial, dual chined tire
with a speed rating of 190 mph (165 kts). A pressure release plug on the
wheel releases tire pressure to prevent over pressurizing.
Normal Brakes
Each main landing gear is equipped with a multiple-disc brake that uses
four rotating steel discs and three stationary steel discs.
Two brake wear indicator pins are installed on the pressure plate and
protrude through the cylinder housing. When the wear indicators are
flush with the cylinder housing with the brakes fully applied, the brake
pads are worn and need replacement. An automatic adjuster keeps
clearance as brake wear occurs.
Brake application is initiated by applying a force to the top of the rudder
pedals, which supplies a control pressure at the master cylinders. The
amount of braking force is proportional to the force applied to the rudder
pedals.
Antiskid protection is available when the aircraft wheel speed is above
approximately 10 knots and below approximately 165 kts (190 mph).
Wheel skid, as measured by the wheel-speed transducer, is signaled to
the control unit which outputs a signal to the power brake/antiskid
control valve to release both brake pressures at the same time. The
HJ1-29000-005-001
October 30, 2016 1-127
FOR TRAINING PURPOSES ONLY