Look, there is no way the transponders would have quit 15 mins apart because of a power failure and then the plane fly for five hours. Maybe it landed, who knows this is quite unusual.
“Look, there is no way the transponders would have quit 15 mins apart because ... “
The most current theory lining up all the holes in the Swiss cheese is 1) a loss of cabin pressure (possibly a rupture involving the area of the ‘E and E galley’ taking out the transponders) 2) due to a ruptured O2 bottle (like happened before on another A/C type.)
Oh yeah, we’ve been there before (in 2005) where the crew was done in by hypoxia:
http://en.wikipedia.org/wiki/Helios_Airways_Flight_522
An Oxygen bottle ruptures a hull: