There is something that bothers me...
The pilots landed safely in Porto Alegre, with the same problems.
So they sure knew what to do...
I think that the investigation didnīt reveal everything yet, or may be some things unvealed.
I remember that many years ago, a B737 tried to take off at Buenos Aires, without setting the flaps, causing a big mess, due to a combination of psycological/maintenance/air hostess mumbo jumbo factors.