Aviation Mechanic - General, Airframe, and Powerplant › II. Airframe › Task G. Environmental Systems

AM.II.G.R5

Risk management

Manufacturer's recommended servicing procedures, including refrigerant types.

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

Aviation Maintenance Technician Handbook - Airframe p. 16-57
Chapter 16: Cabin Environmental Control Systems › Vapor Cycle Air Conditioning › System Servicing
aircraft manufacturer’s maintenance manual specifies this amount and the amount and type of oil to be put into the system when filling. Pre-weighing the refrigerant or setting the refrigerant weight into the servicing cart input ensures the system ... immediately after evacuation of the system is completed. With the hoses still connected to the high and low side service valves, selecting charge on the service cart panel positions solenoid operated valves so that the refrigerant supply is available. First…
Aviation Maintenance Technician Handbook - Airframe p. 16-52
Chapter 16: Cabin Environmental Control Systems › Vapor Cycle Air Conditioning › Vapor Cycle Air Conditioning Servicing Equipment
Figure 16-86. A basic manifold set for servicing a vapor cycle air conditioning system. Figure 16-87. The internal workings of a manifold set with the center fitting isolated (top). Opening a valve connects the center hose to that ... system and the gauge (bottom). Special hoses are attached to the fittings of the manifold valve for servicing the system. The high-pressure charging hose is usually red and attaches to the service valve located in the high side…