This SAE Aerospace Information Report provides a general discussion on gaseous breathing oxygen and oxygen equipment for use on commercial aircraft. Other types of oxygen systems are mentioned to assist in this discussion. For detailed information on systems other than gaseous, refer to the appropriate section of AIR825. The content of the SAE Aerospace Information Report is updated to reflect the latest oxygen system design practice realized on current aircraft.References to actual standards (e.g., SAE, ISO) are added. Extensive revision of the chapters fire risks, design precautions and the use of check valves are included. Editorial changes are made in addition.

This report provides information on the design and use of aircraft oxygen systems. It explains the physiological oxygen requirements of the human body in both a normal environment and in an hypoxic environment.It includes an overview of the continuous flow, demand and pressure demand, and liquid oxygen systems. A basic understanding of how each system operates is then specifically addressed in its own titled section.The charts, tables, and schematics provide a specific example of a theoretical oxygen system design and the calculations showing how that system would meet the regulations established by the FAR's. A comprehensive overview of the theoretical oxygen requirements of the human body at altitude is also provided.A detailed list of specifications and standards applicable to aircraft oxygen systems is included. AIR825C is a comprehensive document covering general information on the various types of oxygen equipment and oxygen systems used on aircraft including basic system design information. These requirements and more are covered in greater individual detail by other SAE documents in an AIR825/1 through AIR825/14 document series.

This document is intended to give general instructions and directions for personnel performing maintenance and modification work on Oxygen Systems. AIR1392A has been reaffirmed to comply with the SAE five-year review policy.

This SAE Aerospace Recommended Practice (ARP) covers procedures or methods to be used for fabricating, handling, testing, and installation of oxygen lines in an aircraft oxygen system. This report, in conjunction with the other referenced SAE documents, provides a comprehensive guide for the development and test of aircraft oxygen system lines. This document has been revised to reflect current industry recommended practices regarding the fabrication, installation, and test of aircraft oxygen system lines. The SAE A-10 committee has revised this document to include industry recommendations for repair and electrical bonding of aircraft oxygen system lines.

The purpose of this document is to give the reader an overview of the document package which makes up AIR825, Introduction to Oxygen Equipment for Aircraft, and a basic overview (see Section 4) of the operational concerns driven by human physiology during altitude exposure. AIR825/1 has been reaffirmed to comply with the SAE five-year review policy.