---
title: "SPO.IDE.A.175 Supplemental oxygen – non-pressurised aeroplanes — Part-SPO · Avioverse"
description: "Non-pressurised aeroplanes operated at flight altitudes when the oxygen supply is required in accordance with (b) shall be equipped with oxygen storage…"
url: "https://avioverse.aero/regulations/easa/air-ops/part-spo/subpart-d/spo-ide-a-175"
---

# SPO.IDE.A.175 Supplemental oxygen – non-pressurised aeroplanes

ANNEX VIII (Part-SPO) · Regulation (EU) No 965/2012 · EAR revision 27 Mar 2026

IR Implementing rule

## SPO.IDE.A.175 Supplemental oxygen – non-pressurised aeroplanes

(a) Non-pressurised aeroplanes operated at flight altitudes when the oxygen supply is required in accordance with (b) shall be equipped with oxygen storage and dispensing apparatus capable of storing and dispensing the required oxygen supplies.

(b) Non-pressurised aeroplanes operated above flight altitudes at which the pressure altitude in the cabin compartments is above 10 000 ft shall carry enough breathing oxygen to supply:

(1) all crew members for any period in excess of 30 minutes when the pressure altitude in the cabin compartment will be between 10 000 ft and 13 000 ft; and

(2) all persons on board for any period that the pressure altitude in the cabin compartment will be above 13 000 ft.

(c) Notwithstanding (b), excursions of a specified duration between 13 000 ft and 16 000 ft may be undertaken without oxygen supplies, in accordance with SPO.OP.195(b).

IR · SPO.IDE.A.175 — Regulation (EU) No 965/2012 · Regulation (EU) No 379/2014 · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

AMC Acceptable means of compliance

## AMC1 SPO.IDE.A.175 Supplemental oxygen – non-pressurised aeroplanes

DETERMINATION OF OXYGEN

(a) In the determination of oxygen for the routes to be flown, it is assumed that the [aeroplane](https://avioverse.aero/glossary/easa/aeroplane) will descend in accordance with the emergency procedures specified in the AFM, without exceeding its operating limitations, to a flight altitude that will allow the flight to be completed safely (i.e. flight altitudes ensuring adequate terrain clearance, navigational accuracy, hazardous weather avoidance etc.).

(b) The amount of oxygen should be determined on the basis of cabin pressure altitude and flight duration.

AMC · AMC1 SPO.IDE.A.175 — Regulation (EU) No 965/2012 · ED Decision 2014/018/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

[All rules in SUBPART D: INSTRUMENTS, DATA AND EQUIPMENT](https://avioverse.aero/regulations/easa/air-ops/part-spo/subpart-d)

Consolidated from the EASA Easy Access Rules (revision 27 Mar 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.