CAT.IDE.H.240 Supplemental oxygen — non-pressurised helicopters

Non-pressurised helicopters operated at pressure altitudes above 10000 ft shall be equipped with supplemental oxygen equipment capable of storing and dispensing the oxygen supplies in accordance with the following tables.

Table 1 Oxygen minimum requirements for complex non-pressurised helicopters

Supply for	Duration and cabin pressure altitude
Occupants of flight crew compartment seats on flight crew compartment duty and crew members assisting flight crew in their duties	The entire flying time at pressure altitudes above 10000 ft.
Required cabin crew members	The entire flying time at pressure altitudes above 13000 ft and for any period exceeding 30 minutes at pressure altitudes above 10000 ft but not exceeding 13000 ft.
Additional crew members and 100 % of passengers	The entire flying time at pressure altitudes above 13000 ft.
10 % of passengers	The entire flying time after 30 minutes at pressure altitudes above 10000 ft but not exceeding 13000 ft.

Table 2 Oxygen minimum requirements for other-than-complex non-pressurised helicopters

Supply for	Duration and cabin pressure altitude
Occupants of flight crew compartment seats on flight crew compartment duty, crew members assisting flight crew in their duties, and required cabin crew members	The entire flying time at pressure altitudes above 13000 ft and for any period exceeding 30 minutes at pressure altitudes above 10000 ft but not exceeding 13000 ft.
Additional crew members and 100 % of passengers	The entire flying time at pressure altitudes above 13000 ft.
10 % of passengers	The entire flying time after 30 minutes at pressure altitudes above 10000 ft but not exceeding 13000 ft.