ASTM F3227/F3227M-20,Standard Specification for Environmental Systems in Aircraft.
ASTM F3227/F3227M-20 covers international standards for the environmental system aspects of airworthiness and design for “small” aircraft.
Referenced Documents
F3083/F3083M Specification for Emergency Conditions, Occupant Safety and Accommodations.
F3233/F3233M Specification for Instrumentation in Small Aircraft.
Oxygen Equipment and Supply
If certification with supplemental oxygen equipment is requested, or the aircraft is approved for operations at or above altitudes where oxygen is required to be used by the operating rules, oxygen equipment must be provided that meets the requirements of 6.1.2 6.1.8,6.2,6.3,6.4,and6.5.
6.3 Oxygen Distribution System
6.3.1 If an oxygen distribution system is installed, except for flexible lines from oxygen outlets to the dispensing units, or where shown to be otherwise suitable to the installation, nonmetallic tubing must not be used for any oxygen line that is normally pressurized during flight.
6.3.2 If an oxygen distribution system is installed, nonmetallic oxygen distribution lines must not be routed where they may be subjected to elevated temperatures.
6.3.3 If an oxygen distribution system is installed, nonmetallic oxygen distribution lines must not be routed where they may be subjected to electrical arcing.
The size of this pdf file is 4.46M.Now you can download it.