UFO Magazine Article:

The 1996 FAB Tucano Case 

(Revista UFO, Campo Grande, Brazil)

The article is written by the Brazilian UFO researcher Reginaldo 
de Athayde:

http://www.ufo.com.br/artigos/misterio-na-queda-do-tucano-da-esquadrilha-da-fumaca

An unknown object was filmed while it seemingly knocked a 
Brazilian Air Force (FAB) Tucano airplane out of the sky during 
an air show in Santos, Sao Paulo, Brazil on 16 November 1996.

English translation:

http://translate.google.com/translate?hl=no&sl=pt&tl=en&u=http%3A%2F%2Fwww.ufo.com.br%2Fartigos%2Fmisterio-na-queda-do-tucano-da-esquadrilha-da-fumaca

I also reported on this case on 27 December 2008:

brazilian-air-force-airplane.htm

(3.bp.blogspot.com photo)