Sure about that despegue?
Here is a link to download your own copy of the
Boeing FCTM.
4shared.com - document sharing - download 737 FCTM.pdf
Please read the "Speedbrakes" section beginning on page 4.20. Like has been stated, it says specifically, "Use of speedbrakes between the down detent and flight detent can result in rapid roll rates and normally should be avoided."