STRUTS & HARDWARE
The landing gear type on the UH-60M is described as this, because it never folds up into the fuselage after takeoff.
What is fixed (or non-retractable)?
The pilot and copilot apply the wheel brakes by pressing the tops of these flight controls.
What are the directional control pedals (toe brakes)?
When unlocked, the tail wheel can freely swivel up to this many degrees to assist in tight ground taxiing.
What is 360 degrees?
"WOW" is the acronym for this critical landing gear sensor system.
What is Weight On Wheels?
The UH-60M has this many main landing gear wheels.
What is two?
These two-stage components are filled with nitrogen and MIL-PRF-83282 hydraulic fluid to absorb the impact of landing.
What are the shock struts?
This T-shaped handle on the lower center console is pulled to keep the aircraft from rolling while parked on the flight line.
What is the parking brake handle?
This switch, located on the center console, uses an electrical actuator to prevent the tail wheel from swiveling.
What is the Tail Wheel Lock switch?
The aircraft is equipped with two WOW switches, which are physically mounted on these components.
What are the left and right main landing gear shock struts?
True or False: The tail wheel has its own set of brakes to help the helicopter stop.
What is False?
This heavy-duty beam connects the lower end of the main shock strut to the fuselage, handling rearward drag forces during landing.
What is the drag beam?
Each main landing gear wheel is equipped with this specific type of hydraulic brake assembly to provide stopping power.
What is a dual-disc hydraulic brake?
When the tail wheel lock pin is disengaged, this advisory illuminates on the EICAS display to alert the pilots.
What is the TAIL WHEEL UNLK advisory?
The primary purpose of the WOW switch is to tell the aircraft's electrical and hydraulic systems whether the helicopter is airborne or in this state.
What is on the ground?
The tail wheel lock uses a metal one of these to drop down and hold the wheel perfectly straight.
What is a pin?
The two stages of the main landing gear shock strut are designed to absorb energy from these two specific types of impacts.
What are normal landings and crash/hard impacts?
To properly set the parking brake, the pilot must pull the parking brake handle while simultaneously doing this.
What is applying pressure to the brake pedals?
When the tail wheel is commanded to lock, a metal pin drops into this specific component to keep the wheel perfectly straight.
What is the fork assembly?
The WOW switch physically actuates and changes state when this action happens to the main landing gear.
What is the compression of the shock strut?
When the helicopter lifts off, the shock struts stretch out, which tells the WOW switch the aircraft is now doing this.
What is flying (or airborne)?
Routine servicing and inspection of the shock struts are verified by measuring this exposed section in inches, based on aircraft gross weight.
What is the strut extension (or piston/chrome extension)?
When the brake pedals are pressed, they actuate these specific components to push hydraulic fluid down to the wheel brake assemblies.
What are the brake master cylinders?
If the electrical lock actuator fails, a crew chief can manually unlock the tail wheel from the outside by pulling this component on the strut.
What is the manual override handle?
When the WOW switch indicates the aircraft is on the ground, it automatically disables this emergency electrical function to prevent accidental deployment on the flight line.
What is the automatic activation of the Underfrequency protection?
The lower stage of the main landing gear shock strut is designed to yield and absorb up to this specific G-force during a crash sequence.
What is 11.25 Gs?