Airman Certification Standards
ACS CA.VIII.A
Supplemental Oxygen
Knowledge
Regulatory requirements for supplemental oxygen use by flight crew and passengers.
Physiological factors, including:
a. Impairment
b. Symptoms of hypoxia
c. Time of useful consciousness (TUC)
Operational factors, including:
a. Characteristics, limitations, and applicability of continuous flow, demand, and pressure- demand oxygen systems
b. Differences between and identification of “aviator’s breathing oxygen” and other types of oxygen
c. Precautions when using supplemental oxygen systems
Risk Management
High altitude flight.
Use of supplemental oxygen.
Management of compressed gas containers.
Combustion hazards in an oxygen-rich environment.
Skill
Determine the quantity of supplemental oxygen required in a scenario given by the evaluator.
Operate or simulate operation of the installed or portable oxygen equipment in the airplane, if installed or available.
Brief passengers on use of supplemental oxygen equipment in a scenario given by the evaluator.
Use single-pilot resource management (SRM) or crew resource management (CRM), as appropriate.
Retrieved from ecfr.gov on July 17, 2026.