A Northwest Airlines jet that flew 150 miles beyond its scheduled arrival airport has renewed concerns over pilot rest. The NTSB reports that Northwest Flight 188 from San Diego to Minneapolis went more than 75 minutes without responding to radio calls from air-traffic controllers on Wednesday evening. Upon landing safely at Minneapolis-St. Paul International Airport, the pilots told investigators they were engaged in a "heated discussion over airline policy" and lost track of their whereabouts. Delta Air Lines, the corporate parent of Northwest, issued the following statement: "We are cooperating with the FAA and NTSB in their investigation as well as conducting our own internal investigation. The pilots have been relieved from active flying pending the completion of these investigations."
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