Podcast
Questions and Answers
Which hydraulic system pressure is used by the normal brake system?
Which hydraulic system pressure is used by the normal brake system?
What provides pressure to operate the brakes for the parking brake system?
What provides pressure to operate the brakes for the parking brake system?
What stops wheel rotation before the landing gear retracts?
What stops wheel rotation before the landing gear retracts?
What connects the pedals to the brake metering valve assemblies?
What connects the pedals to the brake metering valve assemblies?
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What controls different pressure sources to supply pressure to the brake functions?
What controls different pressure sources to supply pressure to the brake functions?
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What does the brake accumulator supply pressure to if hydraulic systems A and B do not supply pressure?
What does the brake accumulator supply pressure to if hydraulic systems A and B do not supply pressure?
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What does the brake pressure transducer monitor?
What does the brake pressure transducer monitor?
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What do the brake shuttle valves select and send to the brakes?
What do the brake shuttle valves select and send to the brakes?
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What do the main landing gear wheel brakes use hydraulic pressure for?
What do the main landing gear wheel brakes use hydraulic pressure for?
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What controls the normal, alternate, and parking brake pressure to the brakes?
What controls the normal, alternate, and parking brake pressure to the brakes?
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Study Notes
Brake System Pressure
- Normal brake system operates using hydraulic pressure generated by hydraulic systems A and B.
- Parking brake system is operated through a mechanical pressure source separate from the hydraulic systems.
Landing Gear Retraction
- Before landing gear retracts, antiskid system stops wheel rotation to prevent skidding.
Brake Control Mechanisms
- Brake pedals are connected to brake metering valve assemblies, which manage brake fluid flow.
- Different pressure sources are controlled by a pressure control unit to supply appropriate pressure for varied brake functions.
Backup Pressure Systems
- Brake accumulator provides backup pressure to the brake system if hydraulic systems A and B fail to supply adequate pressure.
Monitoring and Selecting Brake Pressure
- Brake pressure transducer continuously monitors hydraulic pressure levels within the brake system.
- Brake shuttle valves are responsible for selecting pressure from the operational hydraulic system and sending it to the brakes for effective function.
Main Wheel Brake Function
- Main landing gear wheel brakes utilize hydraulic pressure primarily for safe and efficient deceleration.
- Pressure control systems regulate normal, alternate, and parking brake pressure to ensure consistent functionality and performance.
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Description
Test your knowledge of the hydraulic brake system used to control pressure to the main landing gear brakes, including the selection of hydraulic pressure sources and their functions such as normal, alternate, and parking brakes.
