Landing Gear Flashcards
How is the landing gear controlled?
Hydraulically actuated and electrically controlled by the proximity sensing system (PSS)
What powers the landing gear and nose wheel steering?
Hydraulic system #3
How is the main landing gear held up when retracted?
Mechanical uplocks
How is the gear held down in the extended position?
Locking mechanisms in the main landing gear side strut actuators
What happens when the gear is retracted?
- Landing gear solenoid is released
- landing gear selector valves energized to release downlocks
- uplocks are engaged when gear is fully retracted
What happens when the gear is extended?
- Landing gear selector valves energized to release uplocks
- landing gear downlocks are hydraulically and mechanically engaged
Nose wheel steering limit?
80°
Rudder steering limit
8°
What type of tires are on the nose wheel?
Chine tires that help redirect water from the engines
What powers the inboard and outboard brakes?
Inboard - hydraulic system # 3
Outboard - hydraulic system # 2
What stops the main wheels from spinning on gear retraction?
Hydraulic pressure from the nose landing gear is applied to the brake control valves
What does stopping the wheel rotation accomplish?
Eliminates the gyroscopic precession caused by the spinning wheels
With loss of hydraulic system 1 and 2, will you have braking?
Yes, 6 brake applications with the anti-skid off supplied by the accumulators
How must the brake wear indicators be checked?
Brakes applied and hydraulic systems # 2 and 3 pressurized
Which brakes will hold for a prolonged period with the parking brake set?
The inboard brakes
