"No one switches off all the electrics in an aircraft while it...

"No one switches off all the electrics in an aircraft while it is in flight. There was no emergency declared at all."

Fire can't damage wiring? As insulation burns off, wires short out until most electrics are gone. Does not require anyone to intentionaly switch them off.

The transmitters on the engines however would not be exposed to this fire, and they have their own power source.

Oil rig worker saw burning.

It all fits