HYS
This is the normal operating pressure output of the UH-60M variable-delivery hydraulic pumps.
What is 3,000 psi (or 3,050 ± 50 psi)?
This cockpit control determines the helicopter's heading or yaw by controlling the pitch of the tail rotor blades.
What are the tail rotor pedals?
This subsystem enhances dynamic (short-term) stability in the pitch, roll, and yaw axes to prevent oscillation.
What is the Stability Augmentation System (SAS)?
The backup hydraulic system can automatically provide pressure to recharge this starting component.
What is the APU accumulator?
This is the standard color of the hydraulic fluid (MIL-PRF-83282) used in the UH-60M.
What is red?
This specific system supplies hydraulic pressure to the first stage primary servos and the first stage tail rotor servo.
What is the No. 1 Hydraulic System?
This control system provides forward, rearward, and lateral control of the aircraft.
What is the cyclic control system?
This system provides static (long-term) stability and includes autopilot functions like heading hold and turn coordination.
What is Flight Path Stabilization (FPS)?
If a pressure loss occurs in the first stage of the tail rotor servo, the backup pump will immediately supply pressure to this component.
What is the second stage tail rotor servo?
What kind of bolt is used as the primary connection in the flight control system?
What is Self-retaining bolts?
This system supplies hydraulic pressure to the pilot assist servos and the second stage primary servos.
What is the No. 2 Hydraulic System?
This servo is designed to reduce flight control friction and prevent feedback from the Yaw SAS actuator into the cockpit controls.
What is the yaw boost servo?
This subsystem maintains the flight control position and provides a force gradient that the pilot can safely override.
What is the Trim system?
This module directs the flow of hydraulic pressure from the backup pump to the No. 1 or No. 2 transfer module.
What is the utility module?
What flight control system gives vertical helicopter control?
What is Collective control system?
These two identical, interchangeable filters are located on the pump modules to prevent contaminated hydraulic fluid from circulating.
What are the pressure and return filters?
These are the three main flight controls used by the pilot and copilot to manually fly the aircraft.
What are the cyclic, collective, and tail rotor pedals?
This is the specific button on the cyclic that the pilot presses to temporarily release the control locks and reposition the cyclic.
What is the Trim Release button?
This is the cockpit switch position you must select to manually turn on the backup hydraulic pump.
What is ON?
When installing a new hydraulic refill hand pump, how much torque, in inch-pounds, should you apply to the union where the pressure line attaches to the pump?
What is 155-165 inch-pounds?
While installing the No. 2 Hydraulic pump module, what area should you not prime?
What is Do not prime packing recess.?
This mechanical unit combines control inputs to provide proportional output to the main and tail rotor servos.
What is the mechanical mixing unit (mixer)?
This is the main purpose of the AFCS: to help the pilot maintain control and increase aircraft __________.
What is stability?
This is the primary source of power (AC or DC) required to run the electric motor of the backup pump.
What is AC power?
When bleeding the hydraulic system, how long should you operate the system to ensure that all the air is removed?
What is 15 minutes?