Originally Posted by
Old Akro
I also wonder if you have flown at 10,000 ft. Previously, you could cruise at (say) 10,000ft, then pop up to 10,500 or 11,000 ft (subject to the transition layer) for a short period without oxygen to get over a buildup. Now you cant.
When could you previously "pop up above 10,000ft without oxygen"? For quite some time now I believe the CAO has stated that in an unpressurised a pilot must be provided with and use supplemental oxygen when above 10,000ft.
Provided the flight did not exceed FL140 and the time above 10,000ft did not exceed 30 minutes the
passengers do not require oxygen. (Is that what you might be referring to?)
I note that you said "pop up" and not "cruise" but if your intent was to level off at 10,500ft for a short duration when have you been allowed to do that either as one is not permitted to cruise within the transition layer?