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Thread: DL 767-300 decompression (DL 2353 9/18)
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Old Sep 19, 2019, 7:49 pm
  #44  
skywardhunter
 
Join Date: Oct 2015
Location: Economy, mostly :(
Programs: Skywards Gold
Posts: 7,801
Originally Posted by timfountain
As you likely know, at max cruise altitude (above 35k ft.) one of the pilots SHOULD be wearing an O2 mask full time as per FAR 91.211. It's a well know fact that this is one of the most disregarded rules in the aviation industry. But this episode is there to remind us why that rules exists....
except that the one pilot need not wear and use an oxygen mask while at or below flight level 410 if there are two pilots at the controls and each pilot has a quick-donning type of oxygen mask that can be placed on the face with one hand from the ready position within 5 seconds, supplying oxygen and properly secured and sealed.


​​​​​​​That being said I'm surprised that despite the above this is rather a strict rule and the next paragraph does require one pilot to wear the mask while the other is out of their seat (e.g. during a crew member change or lav break)
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