Hermetiseeritud lennuk, mis on ette nähtud lendamiseks kõrgustel, kus õhurõhk on alla 376 hektopaskali, peab olema varustatud pilooti hoiatava dehermetiseerimise signalisatsiooniga.
Pressurised aeroplanes operated at pressure altitudes above 25 000 ft, in the case of operations for which a cabin crew member is required, shall be equipped with a supply of undiluted oxygen for passengers who, for physiological reasons, might require oxygen following a cabin depressurisation.
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