dr dre
If the oxygen bottle has ruptured in cruise, resulting in extensive damage to the electronics bay and a gradual decompression event ensues, then the cabin altitude warning will NOT occur straight away, it would occur some time later. The cabin altitude starts to climb gradually. However, the crew will be bombarded with immediate failures, especially anything electrical and reliant on P105 & L AIMS eg 4/6 DU failed. They would be definitely overloaded mentally. Whilst they problem solve, it would be easy for the crew to be task fixated on a problem and miss the gradual decompression event. Considering both pilots were smokers, their lung capacity would be equivalent to a much higher altitude when the Cabin Altitude message finally appeared at 15000feet.
When the aircraft was near Penang, if someone programs a diversion to Banda Aceh via NILAM-SANOB the autopilot will follow that route and the aircraft will end in the southern Indian Ocean, without any human intervention, at 34S 93E.
All occupants may have been deceased as early as 1800Z due to hypoxia, 40minutes after the rupture.