The Citation's turbines have been examined by Pratt & Whitney in Sorocaba:
Perícia descarta problemas nas turbinas do avião de Campos
"The tests found that there were no signs of birds in the engines, or of collision with any other equipment. There was also no sign of fire in the engines".
The aeronautic chart for the instrument approach, "Echo Uno" in the tower recordings, is
http://www.aisweb.aer.mil.br/downloa...7-72567f175e3a
The crash location indicates a tighter radius curve than that indicated on the chart.
Older news is that a NOTAM closed the airport after the accident, until the NDBs could be verified; they soon were, and the airport re-opened.