i takes more to fly an aircraft than a radio and instruments,there are also engines and flight controls,that's what makes the aircraft move,move is what it does at 30,000 ft,what would of happened with the last of the available DC gone.
This reminds me of the DC 10 that crashed with the loss of hydraulics power to ALL 3 sys a few years back ,all it took to take the aircraft out was 1 grain of SAND(it was in the #2 eng compressor disc,left over from the day it was cast).
1 SIMPLE GRAIN OF SAND KILLED MANY PEOPLE,WHEN WILL THESE MANAGERS LEARN, SORRY ACCOUNTANTS THAT AIRCRAFT MAINTENANCE HAS TO BE DONE RIGHT THE 1ST TIME,SOMETIMES YOU DON'T GET A SECOND CHANCE.