NEW : Airways ' records show nothing to indicate sudden departure was preplanned . Every one of the five people on board is both a possible victim and suspect . The plane 's pilots have become one obvious area of concern . A 29-year - old Malaysian civil aviation engineer is also under the spotlight .
NEW : Pilots ' computers show nothing to indicate sudden deviation was preplanned . Every one of the 239 people on board is both a possible victim and suspect . The plane 's pilots have become one obvious area of focus . A 29-year-old Malaysian civil aviation engineer is also under the spotlight .