Domanda 182, Operational Procedures - ATPL - Airline Transport Pilot license

30 minutes.
The entire flight time when the cabin pressure altitude exceeds 13000 ft.
The entire flight time where the cabin pressure altitude exceeds 15000 ft, but in no case less than 10 minutes.
The entire flight time after 30 minutes at pressure altitude greater than 10000 ft but not exceeding 13000ft.