Aviation Mechanic - General, Airframe, and Powerplant › II. Airframe › Task I. Communication and Navigation Systems

AM.II.I.K15

Knowledge

Ground proximity warning system (GPWS) theory, components, and operation.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Instrument Flying Handbook p. 9-35
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…
Aviation Maintenance Technician Handbook - Airframe p. 16-56
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…
14 CFR Part 91 — General Operating and Flight Rules Open
14 CFR Part 91, Special Federal Aviation Regulation No. 97—Special Operating Rules for the Conduct of Instrument Flight Rules (IFR) Area Navigation (RNAV) Operations using Global Positioning Systems
Part 91, Special Federal Aviation Regulation No. 97—Special Operating Rules for the Conduct of Instrument Flight Rules (IFR) Area Navigation (RNAV) Operations using Global Positioning Systems (GPS) in Alaska Station referenced. Station referenced refers to radio navigational aids ... fixes that are referenced by ground based navigation facilities such as VOR facilities. Wide Area Augmentation System (WAAS). WAAS is an augmentation to GPS that calculates GPS integrity and correction data on the ground and uses geo-stationary satellites…