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Questions and Answers
What percentage of persons onboard are sufficiently covered by portable first aid oxygen following a pressurization failure at altitudes between 8000 ft and 15000 ft?
What percentage of persons onboard are sufficiently covered by portable first aid oxygen following a pressurization failure at altitudes between 8000 ft and 15000 ft?
What is the minimum time PBE must provide breathing gas for each member of the flight crew?
What is the minimum time PBE must provide breathing gas for each member of the flight crew?
Which document contains detailed information on the first aid oxygen carried on board?
Which document contains detailed information on the first aid oxygen carried on board?
What must PBE not interfere with when in use by the flight crew?
What must PBE not interfere with when in use by the flight crew?
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How many portable protective breathing apparatuses must be available on the flight deck?
How many portable protective breathing apparatuses must be available on the flight deck?
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What is the minimum supply of oxygen required for flight crew members if the cabin pressure altitude exceeds 25,000 ft?
What is the minimum supply of oxygen required for flight crew members if the cabin pressure altitude exceeds 25,000 ft?
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At what altitude must each flight crew member have an oxygen mask readily accessible?
At what altitude must each flight crew member have an oxygen mask readily accessible?
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What is the requirement for an oxygen mask if the aircraft is operating above 25,000 ft?
What is the requirement for an oxygen mask if the aircraft is operating above 25,000 ft?
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What must be taken into account when determining the oxygen supply needed for flight crew members?
What must be taken into account when determining the oxygen supply needed for flight crew members?
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When should flight crew members use supplemental oxygen continuously?
When should flight crew members use supplemental oxygen continuously?
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Which of the following statements about the oxygen supply for cabin pressure failure is correct?
Which of the following statements about the oxygen supply for cabin pressure failure is correct?
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What is the minimum quantity of oxygen supply required for a descent from maximum altitude to 10,000 ft?
What is the minimum quantity of oxygen supply required for a descent from maximum altitude to 10,000 ft?
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If cabin pressure altitude exceeds 10,000 ft after the first 30 minutes, how long must oxygen be available?
If cabin pressure altitude exceeds 10,000 ft after the first 30 minutes, how long must oxygen be available?
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What is the minimum requirement for oxygen supply when the cabin pressure altitude exceeds 15,000 ft?
What is the minimum requirement for oxygen supply when the cabin pressure altitude exceeds 15,000 ft?
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How many dispensing units are required when operating above 25,000 ft?
How many dispensing units are required when operating above 25,000 ft?
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What is the oxygen supply requirement for cabin pressure altitudes between 10,000 ft and 14,000 ft after the first 30 minutes?
What is the oxygen supply requirement for cabin pressure altitudes between 10,000 ft and 14,000 ft after the first 30 minutes?
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What is the purpose of first aid (therapeutic) oxygen onboard?
What is the purpose of first aid (therapeutic) oxygen onboard?
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What is the required minimum oxygen supply for the entire flight when the cabin pressure altitude exceeds 14,000 ft but does not exceed 15,000 ft?
What is the required minimum oxygen supply for the entire flight when the cabin pressure altitude exceeds 14,000 ft but does not exceed 15,000 ft?
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What is mandated for cabin crew members when aircraft operate at altitudes exceeding 25,000 ft?
What is mandated for cabin crew members when aircraft operate at altitudes exceeding 25,000 ft?
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What is the supply requirement for cabin pressure altitudes of 25,000 ft or higher?
What is the supply requirement for cabin pressure altitudes of 25,000 ft or higher?
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When is additional oxygen supply for all persons onboard NOT required?
When is additional oxygen supply for all persons onboard NOT required?
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Study Notes
Oxygen Requirements
- Supplemental oxygen is needed for aircraft operating above 10,000 ft and maintaining cabin pressure below 10,000 ft.
- Flight crew members must have an oxygen mask readily available.
- Above 25,000 ft, the mask must be quick-donning.
- Sufficient oxygen is required for the entire flight if the cabin pressure altitude exceeds 13,000 ft. If it's between 10,000-13,000ft it's required after the first 30 minutes.
- Oxygen supply accounts for cabin pressure altitude and decent profile.
- Minimum required amount is needed for a constant rate descent from maximum certificated altitude to 10,000 ft in 10 minutes, followed by 110 minutes at 10,000 ft.
Flight Crew Oxygen
- Each flight crew member must have an oxygen mask immediately accessible.
- If cabin pressure fails, oxygen supply is sufficient for the whole flight time when the cabin pressure altitude surpasses 13,000 ft, and for the whole flight time when it's between 10,000 and 13,000 ft (after the first 30 minutes).
- There's a minimum 2-hour supply requirement for aircraft with operating altitudes over 25,000 ft
Other Persons Onboard (Oxygen)
- Supplemental oxygen must be available for all other persons onboard, not just the flight crew.
- For altitudes above 25,000ft, a dispensing unit with 10% more outlets than seats is required.
- When operating above 15,000 ft, the supply must be sufficient for the entire flight time, or 10 minutes, whichever is longer. This takes into consideration cabin pressure altitude and decent profile.
- 30% of the onboard personnel need oxygen for flights above 14,000 ft but below 15,000 ft.
- 10% of the onboard personnel need oxygen for flights above 10,000 ft but below 14,000 ft (after the first 30 minutes).
- If the aircraft can fly above 25,000 ft, then therapeutic first-aid oxygen is needed for physiological reasons. This is for when a cabin depressurisation occurs, and the supply needs to be sufficient for 2% of the onboard persons, or at least for one person, but up to a maximum of 2%
- The supplied oxygen will be sufficient for an entire flight time at altitudes above 8,000 ft once a pressurisation failure has occurred
Crew Protective Breathing Equipment (PBE)
- Each flight crew member needs equipment to shield eyes, nose, and mouth, plus 15 minutes of oxygen supply.
- PBE, if in use, cannot interfere with communications.
- A portable protective breathing apparatus is needed which provides 15 minutes of protected breathing supply and should be accessible to each crew member at their duty station.
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Description
This quiz focuses on the oxygen requirements for flight crew operating at various altitudes. It covers essential guidelines for oxygen mask accessibility and supply during flights. Test your knowledge on the regulations regarding supplemental oxygen use in aviation.
