What is Mayday call that Air India pilot issued before plane crash?

According to Directorate General of Civil Aviation (DGCA), pilot of the Air India flight that crashed in Ahmedabad issued Mayday call to ATC moments after takeoff. 'Mayday' is a distress call used by pilots and mariners to request assistance when they believe there's imminent life-threatening danger. The word is repeated three times in a row to declare an emergency.