Your point is well taken. I did not have the POH with me this morning when I posted my statement, and certainly the chapter and verse you quoted casts it in a different light.
Don’t blame the Aerox guy, though. He was stating an opinion without knowledge of the POH verbiage as well. I think he was probably speaking from past experience regarding use in other aircraft.
He did state that he would definitely be interested in pursuing an STC for the Cirrus for their built-in kits, and even stated that he’d consider covering the cost of the regulatory aspects of any effort I made should I go for a 337. He knows that a significant market will exist, and I’d recommend that any SR2x owner that is interested in pursuing a built-in solution contact him to see if a joint effort can benefit both parties and future O2-starved blue-nailed Cirrus owners. His name is Lloyd Boston, and Aerox is at 1-800-237-6902 (East coast).
I started using O2 any time I’m going to be at 8000+ for any length of time, and the occasional mild headaches I used to have after a x-county flight are no more.
According to them, just because the Mountain High unit is approved doesn’t mean that others are precluded.
I agree that this restriction on Oxygen system brand seems a little ridiculous; but I think that Aerox’s comment (above) is miguided. My understanding of the FARs is that pilots are required to follow every stipulation of the Official FAA Approved Airplane Flight Manual (our P.O.H.), which says:
*Whenever the operating rules require the use of supplemental oxygen, the pilot must:
Use an oxygen system approved by Cirrus Design and listed in the Oxygen System AFM Supplement Part Number 11934-S09.
Secure the oxygen bottle in the right front seat as described in the AFM supplement noted above.*
I’m not a lawyer, but it seems to me that the Aerox claim is probably not true from a strictly legal point of view. Some time ago, I discussed this with someone at CD, who said “Yes, but what are the chances of the FAA stopping you on the ramp and complaining about which Oxygen system you’re using?” - which is, I suppose, a valid point - at least until it happens to me.
I don’t have the Oxygen System AFM Supplement here, so I don’t know if it contains anything that could change this… like maybe only recommending the Mountain High system as opposed to specifying it. Perhaps someone who has it handy could comment?