In remark to the passenger quote
Passengers praised the crew's handling of the incident, but some complained that not all the oxygen masks worked properly.
"The elastic was so old that it had deteriorated. I was trying to get my passport, and every time I got my passport the mask fell off and I started to pass out," architect David Saunders told Fairfax.
Despite the fact that the elastic on the mask was deteriorated, David still had oxygen from what I gather. When one bottle goes, dosn't all the O2, secondly, you would only need to check the aircraft and make sure each oxy mask door was open in the cabin. Wouldnt that be enough to explain if the oxy bottle had failed or not?