I've just seen this posted elsewhere:
I got a friend that work's on barajas tower i've asked him about what happens he said:
JKK5022 was at 36L ready to go and the crew request to return to the parking area because they reported something about technical issues.
It was being authorized to go to remote parking area 12 where it stays not much time.
New taxi to 36L this time.
Once it starts to take off...
- Rotated well but once on air the motor 2 started to burn V1 ok but not reached V2 then the plane started to bank right probably in a stall... goes down.
The plan of this plane was go from madrid to canarias it means at least 80%++ fuel, so the plane was probably full or so... so you know what this means.
I think he has a little bit of confusion going on in that text, but I felt it might still be useful to post here. Make of it what you will.