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In accordance with OPS regulations, 10% of the passengers in a non-pressurised aircraft shall be supplied with supplemental oxygen for the entire flight time after 30 minutes at pressure altitudes greater than:
  • A
    10000 ft but not exceeding 14000 ft.
  • B
    10000 ft but not exceeding 15000 ft.
  • C
    10000 ft but not exceeding 13000 ft.
  • D
    14000 ft but not exceeding 15000 ft.

EASA AIR OPS
CAT.IDE.A.240 Supplemental oxygen – non-pressurised aeroplanes

Non-pressurised aeroplanes operated at pressure altitudes above 10 000 ft shall be equipped with supplemental oxygen equipment capable of storing and dispensing the oxygen supplies in accordance with Table 1.

Table 1
Oxygen minimum requirements for non-pressurised aeroplanes

Supply for Duration and cabin pressure altitude
1. 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 10 000 ft.
2. Required cabin crew members The entire flying time at pressure altitudes above 13 000 ft and for any period exceeding 30 minutes at pressure altitudes above 10 000 ft but not exceeding 13 000 ft.
3. Additional crew members and 100 % of passengers(1) The entire flying time at pressure altitudes above 13 000 ft.
4. 10 % of passengers(1) The entire flying time after 30 minutes at pressure altitudes above 10 000 ft but not exceeding 13 000 ft.

(1) Passenger numbers in Table 1 refer to passengers actually carried on board, including persons younger than 24 months.

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