Ok, let's take the fire scenarios serious for one moment...
The question would be, is there a bus or device constellation in the 777 where
a) COM, ATC, ADS-B, ACARS routine report functions become inop or destroyed
b) SATCOM itself is fully operational, but there is no data feed
c) the airframe itself is flyable to some extent, laterally and vertically, but cannot land or has no navigational capabilities
Regrettably those who have access to 777 manuals have left this thread - and this is understandable because
a) a lot of nonsense has appeared over the last 500 pages
b) random deletion of posts
Assuming we have a flyable but partially destroyed airplane scenario JAL123 maybe the closest. Hadn't the captain selected (by differential thrust) to turn towards the mountains, but instead over the sea, the plane may have flown uncontrolled many hours over the Pacific (though a domestic flight and not filled up).
Last edited by threemiles; 4th May 2014 at 18:06.