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庞巴迪挑战者605公务机机组操作手册 CL605-起落架 LANDING GEAR(8)

时间:2011-10-31 11:40来源:蓝天飞行翻译 作者:公务机
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Two brake wear indicator pins are installed on each brake assembly, to provide a visual indication of brake wear. When the end of the wear indicator pin is flush with the top of the indicator housing, the brakes should be serviced.

NOTE
The brake wear indicator pins must be checked with the brakes applied, and hydraulic systems 2 and 3 pressurized.


 LANDING GEAR/BRAKES Description  Vol. 2  15.10.15 
Oct 05/06 


Brakes and Lower Main Gear Structure
Figure 15.10.8


HYDRAULIC Synoptic Page (Inboard and Outboard Brake Pressure) Figure 15.10.9

Parking Brake
To apply the parking brake, fully depress both brake pedals on the pilot’s or copilot’s side, pull 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  15.10.16 
Oct 05/06 


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.
 
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