Fifou:
Newer models of Tucano are different from the older ones that we usually model. The only videos that could serve as a reference are only of the new models. This model has two lights in the front landing gear and the white light in the wing tips are not flashing. I will keep looking for more info.
From what I've been able to see in some older videos, in the older T-27 model the landing lights in the wings are always on, the tail lights are flashing and the white light in the wing tip also flash
This is the last video before the Fumaca squadron moved to the more powerful Super Tucanos.
http://www.youtube.com/watch?v=rGhqCceuPGE
http://www.youtube.com/watch?v=_hpGzG_1uxw