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Part 121 (Australian Air Transport Operations—Larger Aeroplanes) Manual of Standards 2020
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Part 121 (Australian Air Transport Operations—Larger Aeroplanes) Manual of Standards 2020
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Turn the raw legal text into a practical explanation grounded in Part 121 (Australian Air Transport Operations—Larger Aeroplanes) Manual of Standards 2020.
In this Division:
assisting crew member means a crew member assisting a flight crew member with the flight crew member’s duties.
quick-donning mask means an oxygen mask that:
(a) is for a flight crew member’s personal use; and
(b) within 5 seconds of it being deployed and ready for use, the flight crew member can, with 1 hand, place over the face, secure and seal.
required cabin crew member means a cabin crew member required for the flight of an aeroplane under regulation 121.635 of CASR.
standard temperature and pressure means 0 degrees Celsius at a pressure of 760 mm Hg.
STPD means standard temperature and pressure dry.
(1) A pressurised aeroplane operated at a pressure altitude above 10 000 ft (a relevant aeroplane) must be fitted with, or carry, supplemental oxygen equipment capable of storing and dispensing supplemental oxygen to crew members and passengers. (2) Subject to subsection (2A), a relevant aeroplane must carry sufficient supplemental oxygen to meet the requirements set out in table 11.40. (2A) If: (a) the relevant aeroplane is certified to fly with a pressure altitude of only 25 000 ft or below; and (b) the aeroplane is able to safely descend within 4 minutes to a cabin pressure altitude of 13 000 ft; then the supplemental oxygen supply requirements in table 11.40 may be reduced as mentioned in subsection (2B). (2B) For subsection (2A): (a) for a person mentioned in column 1 of item 2 of the table (required cabin crew members)—to a supply for each required cabin crew member for the entire period when the cabin pressure altitude is between 10 000 ft and 13 000 ft; and (b) for a person mentioned in column 1 of item 3 of the table (passengers and crew not covered by item 1 or 2 of the table)—to a supply for 10% of the passengers and those crew, for the entire period when the cabin pressure altitude is between 10 000 ft and 13 000 ft.