CONCORDE crash investigators are examining a former Aerospatiale engineer as part of their case looking into the causes of the Air France tragedy five years ago. The engineer is the latest person to be investigated, following the announcement that Henri Perrier, former head of the Concorde program, was being examined along with Continental Airlines. The Concorde crashed shortly after take off from Paris De Gaulle Airport killing all 109 people aboard and four people in a hotel.