Flight recorder duration must be such that flight data, cockpit voice and sound warnings may respectively be recorded during at least:
20 hours for flight data, 15 minutes for cockpit voices and warnings horns.
48 hours for flight data, 60 minutes for cockpit voices and warnings horns.
25 hours for flight data, 30 minutes for cockpit voices and warnings horns
24 hours for flight data, 60 minutes for cockpit voices and warnings horns.