stopped smouldering but accident investigators are bracing themselves for what may be a longer than usual investigation. the national transportation safety board briefing ended just minutes ago. listen to what investigators know so far. no evidence of an uncontained engine failure. there s no evidence of a preimpact fire. and there is evidence of debris ingestion of foreign debris, such as dirt and wood debris from trees. now, all of this is a preliminary look at the engine and the engine will be transported to the manufacturer for a complete tear-down. all right. so what board members are saying there, essentially, is that the engine did not violently break up in flight.