CA.VIII.A.K1FAA-S-ACS-7B · Nov 2023Knowledge
Regulatory requirements for supplemental oxygen use by flight crew and passengers.
Regulatory requirements for supplemental oxygen use by flight crew and passengers.
Bottom line
At cabin pressure altitudes above 12,500 feet MSL up to and including 14,000 feet MSL, the required minimum flight crew must use supplemental oxygen for flight at those altitudes of more than 30 minutes duration. At cabin pressure altitudes above 14,000 feet MSL, the required minimum flight crew must use supplemental oxygen during the entire flight time at those altitudes. At cabin pressure altitudes above 15,000 feet MSL, each occupant of the aircraft must be provided with supplemental oxygen.
Key numbers
| Number | What it means |
|---|---|
| more than 30 minutes duration, required minimum flight crew, cabin pressure altitudes above 12,500 ft MSL up to and including 14,000 ft MSL | 12,500–14,000 ft |
| entire flight time, required minimum flight crew, cabin pressure altitudes above 14,000 ft MSL | Above 14,000 ft |
| each occupant, cabin pressure altitudes above 15,000 ft MSL | Above 15,000 ft |
| at least a 10-minute supply per occupant, pressurized-cabin aircraft, flight altitudes above FL 250 | Above FL 250 |
FAA references
- 14 CFR 91.211 (Supplemental oxygen.) — eCFR current as of 2026-03-05
- PHAK ch. 7 (p. 7-37) — FAA-H-8083-25C (2023)
- AC 61-107, para. 2-7 — AC No: 61-107B
- AC 61-107, para. 2-9 — AC No: 61-107B
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