Originally Posted by
EMAW
Understand, but the 121 world got their deviation in less than a month. I understand why the reg is what it is, but for an aircraft that likes to be FL360 to FL430 it’s ridiculous and not very healthy to wear a mask for 3+ hrs of a flight with both pilots at the controls. I can understand if one gets up.
The change for part 121 has been in the works for years.