Negligence by air traffic controllers helped cause last month's crash of a Delta Air Lines jumbo jet at Dallas-Fort Worth Airport that killed 135 persons, the airline said in court papers. Delta named the Federal Aviation Administration a party to a suit against the airline filed by the wife of a passenger killed in the Aug. 2 crash of Flight 191. Cynthia Zoe Dahl, 35, of Sandy, Utah, filed the suit against Delta, alleging negligence on the part of the airline. Dahl's husband, Steven Bradley Dahl, 36, died in the crash. Delta filed a petition on Aug. 29 charging the crash was "caused by the negligence of the one or more air traffic control personnel."