gums
value jet had oxygen generators in cargo section, not bottles.
on a DC9 the oxgyen bottles are actually at the 4 o'clock position to the copilot...one for crew one for pax with valves in reach on top of bottles.
AS to the 787...someone will work out the problem...it is interesting to me that both offending batteries are/were in japanese operated airplanes. perhaps mx issues? we shall see...
of course the japanese planes were in the first batch and there might be nothing to really understand except that the batteries might have to be changed every six months as part of the solution.