If Flt crew O2 fails, my (not B/AI) abnormal checklist calls for me to descend to FL100/MEA.
However, the prospect of 'unrelated' smoke in the flight deck following the failure and the fact that I'm a coward who breaths air and flies a multi pilot aircraft where the crew require to communicate (hence portable units have little use without a microphone) mean that a diversion is a very distinct possibility and more likely a certainty.
There was a mention of Afghanistan in an earlier post, I refer to my earlier statement of cowardice and at this point I consider fires to be quite cozy so I'll continue and hold my breath.
