An Air Canada co-pilot having a mental breakdown had to be forcibly removed from the cockpit, restrained and sedated, and a stewardess with an out-of-date license for reading airplane instruments helped the pilot safely make an emergency landing, an Irish investigation concluded Wednesday. The report by the Irish Air Accident Investigation Unit into an incident in January applauded the decision-making of the pilot and the cockpit skills of the flight attendant, who stepped into the co-pilot's seat for the emergency diversion to Shannon Airport in western Ireland. None of the 146 passengers or other nine crew members on board the Boeing 767 bound from Toronto to London was injured after the 58-year-old co-pilot had to be removed by attendants and sedated by two doctors on board. The report did not identify any of the Air Canada crew by name. Nor did it specify the psychiatric diagnosis for the co-pilot, who was hospitalized for 11 days in Irish mental wards before being flown by air ambulance back to Canada.