[McGruff]

the crew had stopped responding to radio messages at 10.30am

So there was communications with the pilots. Next question, what were the last communications?

[null and void]

the crew had stopped responding to radio messages at 10.30am

So there was communications with the pilots.

Assuming the pilots heard the radio calls, of course. I'd like to think that the radio communications don't get washed through the computer system.

That would be silly, but engineers with a charter to build the first 100% computer controlled aircraft are apt to make everything computer controlled!

[Fresh Wind]

Next question, what were the last communications?

Someone shouting "allahu akbar"?