FAA Oxygen Question

[Pin Head]

The maximum altitude without one pilot wearing and using an oxygen mask in a pressurized aircraft equipped with quick-donning oxygen masks is 35,000 ft. MSL.
Above 35,000 ft. MSL, one pilot at the controls must wear a secured and sealed oxygen mask.



Confused. Does that mean all say American Airline pilots on a flight should be wearing there mask?

Obviously they and many thers don't.

[MarkerInbound]

Airline operations fall under a different rule but both have an out. You need to read the complete rule:

(2) When operating at flight altitudes above flight level 250, one pilot at the controls of the airplane shall at all times wear and use an oxygen mask secured, sealed, and supplying oxygen, in accordance with the following:

(i) The one pilot need not wear and use an oxygen mask at or below the following flight levels if each flight crewmember on flight deck duty has a quick-donning type of oxygen mask that the certificate holder has shown can be placed on the face from its ready position, properly secured, sealed, and supplying oxygen upon demand, with one hand and within five seconds:

(A) For airplanes having a passenger seat configuration of more than 30 seats, excluding any required crewmember seat, or a payload capacity of more than 7,500 pounds, at or below flight level 410.

The part 91 rule has the same exemption between 350 and 410. So the mask is only required if one pilot is let out of his cage.

[Pin Head]

Thanks

I will disregard what you said for the exam. It all makes a bit more sense now.