Someone on another board asked if it were possible that some electrical catastrophe may have reset the FMS to an earlier flight plan. Hence the possibility of a turn westard and following waypoints like any normal flight.
This particular 777 is known to have flown to westbound destinations before the flight it disappeared on.
So, question to 777 jockeys here: Does the 777 FMS (or any for that fact) store any previous flight plans up to a certain amount? Or is a flight plan gone once you wipe it and put the next plan in the following day say?
Disclaimer: I am not supporting the theory, but it got me curious as to how much the FMS remembers from previous flights