AMC1 CAT.IDE.A.235(c) Supplemental oxygen – pressurised aeroplanes    

CAA ORS9 Decision No. 1

AEROPLANES WITHOUT AUTOMATIC DEPLOYABLE OXYGEN-DISPENSING UNITS

(a) For operations approved in accordance with Subpart L (SET-IMC) of Annex V (Part-SPA) to Regulation (EU) No 965/2012 with aeroplanes first issued with an individual certificate of airworthiness (CofA) after 8 November  1998,  operated  at  pressure  altitudes  at  or  below 25 000 ft, and not fitted with automatic deployable oxygen-dispensing units, the flight crew should manage the descent in case of a loss of power in order to ensure that the cabin pressure altitude is not higher that 13 000 ft for more than 4 min.

(b) The operator should specify in the operations manual (OM) the aircraft capability in terms of cabin pressure leak rate in case of engine power loss, as well as the relevant procedures.