Document ID: chunk:federal_register_of_legislation:F2007C00850:body:0:p3
Version: federal_register_of_legislation:F2007C00850
Segment Type: other
Provision Reference: 
Character Range: 5373–8067

be immediately available for each cabin attendant.

6 Minimum mass flow of supplemental oxygen
       6.1If continuous flow equipment is installed for the use by flight crew members, the minimum mass flow of supplemental oxygen available for each crew member must not be less than the flow required to maintain, during inspiration, a mean tracheal oxygen partial pressure of 149 mm Hg when breathing 15 litres per minute, BTPS and with a maximum tidal volume of 700 cc with a constant time interval between respirations.  The flow rates and mask efficiencies in Appendix II may be used instead of the above flow rates.
       6.1AIn spite of paragraph 6.1, flight crew members may use nasal cannula manufactured under the name "Oxymizer", subject to the following conditions:
(a) the minimum flow of supplemental oxygen available for each flight crew member at various cabin pressure altitudes must not be less than 0.3 litre per minute at 10 000 feet altitude, increasing by 0.1 litre per minute for every 2 000 feet up to 18 000 feet altitude;
(b) the flight crew members must use the nasal cannula only during private, aerial work, or charter, operations;
(c) the aircraft must not operate above 18 000 feet altitude.
       6.2If demand equipment is installed for use by flight crew members, the minimum mass flow of supplemental oxygen available for each crew member must not be less than the flow required to maintain, during inspiration, a mean tracheal oxygen partial pressure of 122 mm Hg, up to and including a cabin pressure altitude of 35 000 feet and 95 per cent oxygen between cabin pressure altitudes of 35 000 feet and 40 000 feet, when breathing 20 litres per minute BTPS.  In addition, there must be means to allow the crew to use undiluted oxygen at their discretion.
       6.3For passengers and cabin attendants using masks, the minimum mass flow of supplemental oxygen available for each person at various cabin pressure altitudes must not be less than the flow required to maintain, during inspiration and while using the oxygen equipment provided, the following mean tracheal oxygen partial pressures:
(a) at cabin pressure altitudes above 10 000 feet up to and including 18 500 feet, a mean tracheal oxygen partial pressure of 100 mm Hg when breathing 15 litres per minute, BTPS, and with a tidal volume of 700 cc with a constant time interval between respirations;
(b) at cabin pressure altitudes above 18 500 feet up to and including 40 000 feet, a mean tracheal oxygen partial pressure of 83.8mm Hg when breathing 30 litres per minute, BTPS, and with a tidal volume of 1100 cc with a constant time interval between respirations.  The flow rates and mask efficiencies