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the PARKING BRAKE handle, and rotate it 90° to the locked position. To release, fully depress
both brake pedals, rotate the PARKING BRAKE handle to the unlocked position, and push it
down. Both the inboard and outboard brakes will hold when hydraulic systems 2 and 3 are
pressurized, and the PARKING BRAKE handle is set. When the hydraulic systems are selected
off, only the inboard brakes will hold for a prolonged period.
EICAS indicates normal parking brake engagement with the PARKING BRAKE ON advisory
EICAS message.
If the parking brake is engaged with the aircraft in takeoff mode, a PARKING BRAKE warning
EICAS message will be displayed, and a “CONFIG BRAKE” aural warning will sound.
LANDING GEAR/BRAKES
Description
Vol. 2 15−10−15
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
WHEELS AND BRAKES (CONT'D)
PARKING BRAKE Handle
Figure 15−10−10
Anti-Skid System
The anti-skid system consists of a dual-channel (inboard and outboard) anti-skid control unit
(ASCU), four axle-mounted speed transducers, and four anti-skid control valves. The anti-skid
system independently controls the braking of each main wheel, by modulating the hydraulic
pressure applied to each brake.
Rotational speed of each wheel and its rate of deceleration are sensed by the wheel speed
transducers, and the data is transmitted to the ASCU. The ASCU modulates the hydraulic
pressure at the brake to prevent wheel lockup.
Comparing the speed of paired wheels provides a second level of anti-skid protection. The
inboard wheels form one pair, the outboard wheels the other. If, for example, the right inboard
wheel rotates at a significantly slower speed than the left inboard, the ASCU releases the brake
on the slower turning wheel. When both paired wheels return to the same speed, the ASCU
reapplies the released brake.
The ARMED switch on the ANTI-SKID control panel arms the system when the parking brake is
not engaged, and both MLG are down and locked. In air mode (no WOW signal), the ASCU
configures the anti-skid valves to full brake dump, to prevent wheel lockup at touchdown. The
system becomes operational when a 35-knot wheel spin-up signal is generated, or a W0W
signal is present after a 5-second delay. The anti-skid system is functional down to a minimum
wheel spin of 10 knots.
Anti-Skid Test
The TEST button on the LDG GEAR control panel initiates a built-in test of the ASCU and
associated components, during which time the A/SKID IN TEST advisory EICAS message will
be displayed. The test can only be performed with the parking brake off.
LANDING GEAR/BRAKES
Description
Vol. 2 15−10−16
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
CONTROLS AND INDICATORS
The landing gear system provides control of the landing gear, brakes, anti-skid, and the overheat
warning system. Flight deck controls activate normal gear extension and retraction, emergency gear
extension, nosewheel steering, warning horn mute, anti-skid operations, and anti-skid test functions.
The EICAS page presents indications of landing gear position.
Landing Gear Panel
Figure 15−10−11
Landing Gear Manual Release
Figure 15−10−12
LANDING GEAR/BRAKES
Description
Vol. 2 15−10−17
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
CONTROLS AND INDICATORS (CONT'D)
Landing Gear EICAS Page
Figure 15−10−13
LANDING GEAR/BRAKES
Description
Vol. 2 15−10−18
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
EICAS MESSAGES
MESSAGE MEANING
AURAL WARNING
(IF ANY)
GEAR DISAGREE Landing gear position does not match the gear lever
position.
“GEAR DISAGREE”
MLG BAY OVHT High temperature detected in the main landing gear
wheel bins.
“GEAR BAY
OVERHEAT”
NOSE DOOR OPEN
Nose doors are open for 10 seconds after the landing
gear is locked in position, or when airspeed is >250
KIAS.
“NOSE DOOR”
PARKING BRAKE The parking brake is set with the aircraft in the takeoff
mode, with N1 greater than 70% rpm.
”CONFIG BRAKES”
A/SKID INBD
A/SKID OUTBD The respective anti-skid channel has failed or is not armed.
INBD BRAKE PRESS
OUTBD BRAKE PRESS The respective brake system pressure is below 1,015 psi.
MLG OVHT FAIL The overheat detection loop in the gear bay is shorted out.
PARK BRAKE SOV The parking brake shutoff valve does not match the commanded position.
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庞巴迪挑战者605机组操作手册 CL605-LANDING_GEAR(6)
