Re: Any pilots that actually KNOW?
Well, I suppose I can speak to some of these......
Pilots can change transponder codes on the fly.
Yes. One can "Squawk Emergency" but only if you have the time to select the code in the transponder. The "Bad guys" (if they exist) also know this and will "slap" your "pp" if they're in the cockpit with you and they see you reach for the transponder panel.......it's not something you can do covertly unless the door is closed and locked.
Also 3 quick clicks of the mic button will raise someones suspicion of a problem,
There's always "clicks", buzzes, dead carriers etc on ATC frequencies. no one gives them much notice. If they were already switched to ARINC HF (if they were even using HF) , "clicking" the mic button does nothing detectable on the frequency.
With the redundancy built into these planes, it's unlikely both the transponder And radio went out before someone could be alerted to a problem.
Just about ALL airline aircraft that operate over water have (2) VHF radios (plus a third one dedicated to ACARS), 2 HF radios, and some like the 777 and other newer aircraft have Inmarsat and/or Irridium sat phones.
The #1 VHF radio is almost always powered by the emergency DC power source(battery) so even if you lose both engine driven generators AND any other power supply (APU, RAT, or hyd powered generator etc) is inop, you still would have the battery powering 1 VHF comm radio.
BUT if you were already over water and had already switched to HF, there'd be NO ONE to talk to (because the HF is AC powered) and also, if over water, the transponder is of no use unless there happens to be a NAVY ship or AWACS out there messing around.
If there had been a big electrical fire in the cockpit that wouldn't go out, and if the problem was on the emergency busses, it's possible that they might not have had power to the transponder or VHF #1. If it was getting worse, they might have had their hands full just flying the airplane and fighting the fire.
Pilots are trained, stabilize, assess, and notify in a emergency.
You have that right. We call it "AVIATE, NAVIGATE, and COMMUNICATE"
That means FIRST, Fly the airplane. The other stuff is secondary. Communicate is LAST. (for a reason)
It is VERY hard to asses what these guys did without knowing what was going on. The news media is BRIMMING with speculation! They are literally "making it up as they go" and they are basing their speculation on what the various govt agencies are telling them (which might also be filled with speculation)
So it's very hard to even guess what could have happened. It's pretty hard to hide a 777.
My guess is it's in the water, someplace......but that's only because it's outta gas and no one has seen it land on a runway. It's one or the other.