IRImplementing rule
CAT.IDE.H.240Supplemental oxygen – non-pressurised helicopters
Non-pressurised helicopters 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 the following tables. Table 1 Oxygen minimum requirements for complex non-pressurised helicopters
| 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. | |
Table 2 Oxygen minimum requirements for other-than-complex non-pressurised helicopters
| Supply for | Duration and cabin pressure altitude |
|---|---|
| 1. 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 13 000 ft and for any period exceeding 30 minutes at pressure altitudes above 10 000 ft but not exceeding 13 000 ft. |
| 2. Additional crew members and 100 % of passengers(1) | The entire flying time at pressure altitudes above 13 000 ft. |
| 3. 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 2 refer to passengers actually carried on board including persons younger than 24 months. | |
IR · CAT.IDE.H.240 — Regulation (EU) No 965/2012 · Air OPS Easy Access Rules · EAR revision 27 Mar 2026