Regulation 92

Subject to paragraph (2), where a Singapore registered aircraft with a non-pressurised cabin is to be operated at any altitude above flight level 100, the operator must ensure that the aircraft is equipped with a supply of oxygen sufficient for the circumstances that the aircraft is to be operated in, in accordance with the following Table 1. Table 1: Oxygen supply for an unpressurised aircraft CircumstancesSupply forDuration (1)When flying above flight level 100 but not exceeding flight level 120All flight crew membersAny period during which the aircraft is flying above flight level 100. All cabin crew members and 10% of passengersFor any continuous period exceeding 30 minutes, the duration is the period by which 30 minutes is exceeded. (2)When flying above flight level 120All crew members and passengersAny period during which the aircraft flies above flight level 120.

An operator of a Singapore registered aircraft for which the Certificate of Airworthiness was first issued before 1 January 1989 (whether in Singapore or elsewhere), may, in lieu of complying with paragraph (1), ensure that the aircraft is equipped with a supply of oxygen sufficient for continuous use by —

An operator mentioned in paragraph (1) or (2) must ensure that the Singapore registered aircraft is equipped with suitable and sufficient apparatus to enable every person on board to use the oxygen provided.

The quantity of oxygen required to comply with paragraphs (1) and (2) is to be computed in accordance with the relevant information and instructions specified in the operator’s Operations Manual or equivalent document.