Structural purpose
Landing gear supports ground loads, absorbs landing energy and provides aircraft mobility. Main and nose gear arrangements vary widely.
Extension and retraction
Actuators, doors, uplocks, downlocks and sequencing mechanisms control movement. Alternate extension provides a backup method.
Steering and braking
Nose-wheel steering and wheel brakes use command and feedback systems. Anti-skid logic helps prevent wheel lock and maintain directional control.
Maintenance focus
Inspection, servicing and troubleshooting are highly configuration-specific. General theory helps orientation; approved tasks control the work.
