AM.II.I.K18
KnowledgeStability augmentation systems (SAS) (Rotorcraft).
From the FAA library
- Chapter 10. Helicopter Operations › Section 1. Helicopter IFR Operations › 10-1-1. Helicopter Flight Control Systems
Transport Category Rotorcraft. To meet these requirements, helicopter manufacturers usually utilize a set of stabilization and/or Automatic Flight Control Systems (AFCSs). b. Typically, these systems fall into the following categories: 1. Aerodynamic surfaces, which impart some stability or control capability ... hands on” flying of the helicopter by the pilot. 3. Stability Augmentation Systems (SASs), which provide short-term rate damping control inputs to increase helicopter stability. Like trim systems, SAS supports “hands on” flying. 4. Attitude Retention Systems (ATTs), which…
- Chapter 16: Cabin Environmental Control Systems › Vapor Cycle Air Conditioning › System Servicing
Water is removed from the system by evacuation. Anytime the system refrigerant charge falls below atmospheric pressure, the refrigerant is lost, or the system is opened, it must be evacuated before recharging. Evacuating a vapor cycle air conditioning system ... also known as pumping down the system. A vacuum pump is connected and pressure inside the system is reduced to vaporize any water that may exist. Continued operation of the vacuum pump draws the water vapor from the system…
- Chapter 9: Navigation Systems › Instrument Approach Systems › Instrument Landing Systems (ILS)
Instrument Approach Systems Most navigation systems approved for en route and terminal operations under IFR, such as VOR, NDB, and GPS, may also be approved to conduct IAPs. The most common systems in use in the United States ... simplified directional facility (SDF), localizer-type directional aid (LDA), and microwave landing system (MLS). These systems operate independently of other navigation systems. There are new systems being developed, such as WAAS and LAAS. Other systems have been developed for special…