Aircraft Brakes Flashcards
Purpose of brakes
Convert kinetic energy to heat energy
Brake Fade
Phenomenon as a result of brake overheating.
Unable to absorb any further energy, and retardation is reduced.
What caused brake drag?
Wrongly adjusted / faulty break adjuster. May contribute to fade.
Best Extinguisher for Wheel/Brake Fire
Dry Powder
Most popular method of gauging wear on the gear.
Inspect retraction pin while brakes are on.
Carbon or Steel Brakes?
Carbon brakes are much more efficient, lighter, better performance. More expensive to buy however.
When will a full anti-skid system operate?
When there is a normal hydraulic/break system operative.
Effectiveness of Anti-skid using ALTN Brake System
Not as effective.
When is anti-skid prohibited?
Contaminated runway
Functions of an anti-skid
Skid prevention
Touch down Protection
Lock Wheel Protection
Hydroplane Protection
When is anti-skid deactivated?
Manually or automatically when the aircraft has slowed to approx. 20mph
Not a set speed.
Skid Prevention
Reduce Pressure
Lock Wheel Prevention
Release Pressure
Autobrakes
Automatic braking when using the normal brake system during landing rollout and during rejected takeoff.
When will the autobrakes operate only?
With the normal breaking system only.
Autobrake Arm
Certain conditions will have to be met before system operates.
Autobrake Operative
The system is working as intended.
RTO Mode
Maximum brake pressure will be applied if thrust is closed over 85kts groundspeed.
What does the autobrake depend on?
Serviceable normal braking system
Serviceable anti-skid system
Fault in an anti-skid system
DISARM will occur.
Parking Brake
Brakes are pushed fully forward, this puts pressure into the brakes. Parking brake lever is pulled, the pressure applied is locked into the system.
