Originally Posted by
Cloudee
CASA has gone to great expense to put out a plain English guide to part 91 (available in print and online ).
https://www.casa.gov.au/sites/defaul...ve-version.pdf. Page 143.
It states there is a requirement for oxygen above FL125, no mention at all of any 10,000 ft limit that I could find.
“Supplemental oxygen (MOS 26.43)
An aircraft operated at a pressure altitude above FL 125 must be fitted with supplemental oxygen equipment which can store and dispense the oxygen to crew members and passengers as set out in the following table.
Each flight crew member must use the supplemental oxygen as described the following Table.”
There it is, in plain English, published by the regulator, that’s good enough for me.
Did you read the 'plain English' disclaimer at the beginning of the guidance?
...This guide should not be used as a substitute for the aviation regulations or MOS...
Not surprising. The law's the law and the guidance ain't.