Getting to Grips with Aircraft Performance
EN ROUTE LIMITATIONS
The last condition is generally achieved by portable oxygen. As a result, the following table (D2) summarizes the passenger oxygen requirement : > 15,000 ft > 14,000 ft ≤ 15,000 ft Flight Altitude > 10,000 ft ≤ 14,000 ft > 8,000 ft ≤ 10,000 ft Supply to 100% of passengers Supply to 30% of passengers Supply to 10% of passengers (not required during the first 30 minutes) Supply to 2% of passengers after cabin depressurization (achieved by portable oxygen).
With a minimum of 10 minute supply for 100% of passengers
Table D2: Passenger Oxygen Supply Requirement
3.1.3. Flight Profile 3.1.3.1. Oxygen system limitation Following a cabin pressurization failure, the cabin pressure altitude shall be considered the same as the aircraft’s pressure altitude, unless it can be demonstrated that it is highly unlikely. In the studies, it is always assumed that the cabin pressure altitude is the same as the aircraft’s pressure altitude. As a result, it is possible to establish a flight profile, with which the aircraft must always remain, taking into account the above-mentioned oxygen requirements. This profile depends on the installed oxygen system: • Chemical system: Fixed profile (published in the FCOM). • Gaseous system: Customized profile (depends on the number of oxygen bottles and obstacle location). This flight profile represents the maximum level that can be flown with respect to the oxygen system’s capability. As an example, the following Figure (D13) shows the descent profile of a 22 minute oxygen system.
Figure D13: A319 Descent Profile - 22 Minute Oxygen System
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飞行翻译公司 www.aviation.cn 本文链接地址：getting to grips with aircraft performance_部分2.pdf
EN ROUTE LIMITATIONS
The last condition is generally achieved by portable oxygen. As a result, the following table (D2) summarizes the passenger oxygen requirement : > 15,000 ft > 14,000 ft ≤ 15,000 ft Flight Altitude > 10,000 ft ≤ 14,000 ft > 8,000 ft ≤ 10,000 ft Supply to 100% of passengers Supply to 30% of passengers Supply to 10% of passengers (not required during the first 30 minutes) Supply to 2% of passengers after cabin depressurization (achieved by portable oxygen).
With a minimum of 10 minute supply for 100% of passengers
Table D2: Passenger Oxygen Supply Requirement
3.1.3. Flight Profile 3.1.3.1. Oxygen system limitation Following a cabin pressurization failure, the cabin pressure altitude shall be considered the same as the aircraft’s pressure altitude, unless it can be demonstrated that it is highly unlikely. In the studies, it is always assumed that the cabin pressure altitude is the same as the aircraft’s pressure altitude. As a result, it is possible to establish a flight profile, with which the aircraft must always remain, taking into account the above-mentioned oxygen requirements. This profile depends on the installed oxygen system: • Chemical system: Fixed profile (published in the FCOM). • Gaseous system: Customized profile (depends on the number of oxygen bottles and obstacle location). This flight profile represents the maximum level that can be flown with respect to the oxygen system’s capability. As an example, the following Figure (D13) shows the descent profile of a 22 minute oxygen system.
Figure D13: A319 Descent Profile - 22 Minute Oxygen System
107
飞行翻译公司 www.aviation.cn 本文链接地址：getting to grips with aircraft performance_部分2.pdf
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