Oxygen

Question 1

During the preflight inspection, what is the acceptable oxygen quantity reading on the exterior oxygen quantity gauges?

Answer 1

1800 psi, 1500 psi minimum at 70 degrees F

Question 2

What is the minimum oxygen pressure required for dispatch?

Answer 2

1500 psi

Question 3

What are the regulations concerning the use of oxygen masks (FAR 91)?

Answer 3

FL350 and above – When one crew member leaves his crew station (cockpit)
FL410 and above – one crewmember must wear continuously

Question 4

What are the regulations concerning the use of oxygen masks (FAR 135)?

Answer 4

FL250 and above – When one crew member leaves his crew station (cockpit)
FL350 and above – one crewmember must wear continuously