A clearer understanding of what happened does not mean that all of the safety lessons have been identified.
Consider:-
"the first officer and observer repeatedly calculated the fuel and considered a fuel stop in Leticia but did not follow up"
What was discussed, decided, and why. What were the calculations based on, gauge, fuel used, GNS/FMS.
Distance remaining, ground speed, wind, fuel flow; consider the fuel display switching between contents and fuel used, hold-on button or cyclic selection, seven segment digital display format ...
and:-
"an alarm if the fuel remaining was no longer sufficient for more than 20 minutes of flight, however, this system did not activate."
Why didn't the warning system activate (two or four feed tanks, two or more separate alerts?), system failure, or was there something in the tank, what ...
http://www.pprune.org/rumours-news/5...ml#post9613312