Air India on Wednesday said it has imposed a 30-day flying ban on a passenger who had allegedly urinated on an elderly co-passenger during a New York-Delhi flight in November last year and Delhi Police has registered a FIR over the shocking incident. While Directorate General of Civil Aviation (DGCA) also launched an investigation, Air India has set up an internal panel to probe whether there were lapses on part of the crew in addressing the situation that caused distress to the woman.