Originally Posted by
Davvidd
There was also another pilot in the cockpit. The crew also have codes to enter the cockpit on some airlines for sure. Not sure if MH was one of them. The only thing that is sure is that it went down. But how did a 777 disappear and no trace of it was found? Too many odd issues too.
On some airlines, if not most, the occupant of the flight deck can override the ability to gain entry by using the code, so he/she can restrict the ability to gain entry.
https://www.theguardian.com/world/20...nes-questioned
Most airlines now require a second individual to enter the flight deck if one of two pilots needs to leave, for say a toilet break.
https://www.bbc.com/news/magazine-35802645
The problem of not being able to lock from the inside, it that a access can be obtained, using violence if necessary, from the pilot that has entered the cabin and the individual in the flight deck would be powerless to prevent it.
Originally Posted by
JAL750
Australia's DSTG studied all the telemetry from MH370 between 1:21am & 2:25am and concluded MH370 suffered catastrophic electrical failure.
Had either pilot switched off the ADS-B Satcom in the cockpit then a device called the SDU would have ADS-B Satcom log off request to the satellite. MH370 never sent a log -off request.
At 02:25am, MH370 generated a log on request which would only happen in the event of ELMS rebooting the electrics after complete power failure.
The SDU operated off MH370's Left AC Bus relay DSTG concluded pilots were unable to use the transfer bus to power the aircraft. It is most likely the Air Supply Cabin Pressure Controller (ASCPC) was disabled causing the cabin to depressurize at FL350.
There was another
08:19 log-on message - nearly six hours later. An explanation for this is that when the fuel ran out, power was temporally lost, the auxiliary power unit automatically started, the SDU restarted and sent its, "Hullo I'm here" message. So whatever the "catastrophic" electrical failure was, it didn't stop the plane from flying for quite a few hours.
I've not seen the report you refer to, but while I can see switching off ADS-B Satcom in the flight deck would cause a log off request to be sent, what if you simulated a catastrophic power failure, by cutting off the power to the ADS-B Satcom by other means. Does the report consider this?