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DAe Systems passenger emergency oxygen system containers with chemical oxygen generators
A Tu–154M cabin equipped with the passenger emergency oxygen system of DAe Systems
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Type I passenger oxygen containers in test position after installation on a Tu–154M
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The passenger emergency oxygen system of DAe Systems: your best choice
In accordance with the standards and recommended practices of the ICAO (International Civil Aviation Organization), laid down in Appendix 6 to the Convention on International Civil Aviation, Part 1, sections 4.3.8, 6.7.5 and 6.7.6, all aeroplanes intended to be operated at flight altitudes at which the atmospheric pressure is less than 376 hPa, or which, if operated at flight altitudes at which the atmospheric pressure is more than 376 hPa, cannot descend safely within four minutes to a flight altitude at which the atmospheric pressure is equal to 620 hPa, shall be provided with automatically deployable oxygen equipment for passengers and crew members.
The above requirement has been made mandatory by most national civil aviation authorities worldwide and in many cases applies to aeroplanes for which the individual certificate of airworthiness has been first issued before November 9, 1998 as well.
Several years ago the vast majority of the older Russian-/Soviet-built airliners such as the Tupolev Tu–154B, Tu–134, Ilyushin Il–62M, a certain portion of the Tupolev Tu–154M and Antonov An–72/74 aircraft fleets as well as many Ilyushin Il–86s and Yakovlev Yak–42s did not yet have a passenger emergency oxygen system on board.
Following the joint efforts of DAe Systems and BASA, its representative in Central and Eastern Europe, Russia and the CIS at that time, in 1997 a Tupolev Tu–154M airliner belonging to Balkan Bulgarian Airlines, LZ-BTQ, was retrofitted with a passenger emergency oxygen system with chemical oxygen generators and a kit of Oxycrew Protective Breathing Equipment (PBE) of DAe Systems. The retrofit was performed in accordance with the technical documentation of the General Designer of the aircraft at Tupolev PSC and was certified by the Bulgarian Civil Aviation Administration.
The passenger emergency chemical oxygen system of DAe Systems has since been installed on 85 aircraft, including most Tu–154Ms in service as well as Tu–154B, Tu–134, Tu–204–300, Il–62M, An–72/74, An–74TK–300 and An–26B–100 aircraft belonging to Russian, CIS, East European and South American airlines.
The modification of Tu–154 airliners is performed at the Vnukovo Aircraft Overhaul Plant (VARZ–400) in Moscow, Russia.
On your request, we will be pleased to assist you with technical information so that you can develop your own documentation and perform an oxygen system retrofit at your maintenance base. We will also help you with engineering solutions for unusual cabin configurations (VIP etc.) and new aircraft types.
The passenger emergency oxygen solution of DAe Systems is extremely flexible — a proof of this is the above range of modified aircraft types and the retrofit of an airliner such as the Ilyushin Il–18 that has taken place in the past.
The passenger emergency oxygen system with chemical oxygen generators consists of lightweight containers that have been initially designed for the Airbus narrowbody aircraft family. For installation on Russian/CIS aircraft, DAe Systems currently delivers containers that are optimized for the Eastern market.
Each container holds a chemical oxygen generator and breathing masks for passengers connected with supply tubes and lanyards to the generator. The container lid is fixed in closed position by an electrical latch, which will open in case of a cabin decompression.
On Russian/CIS-built aircraft, two main chemical oxygen container types are normally installed:
The Type I container is intended for installation into hatracks in passenger aircraft cabins. It is a light, robust box manufactured from a single sheet of aluminium using a high-technology deep drawing process. There are configurations of this container type with 2, 3 and 4 oxygen masks.
The Type II container with 2 oxygen masks is compact and is intended for installation in aircraft lavatories and entrance areas. Its distinctive feature is the possibility to install it at any spatial angle.
The color of the lids of the oxygen containers is chosen by the customer to comply with the aircraft cabin interior.
Upon emergency (decompression in the aircraft cabin during flight), an altitude switch located in the front section of the aircraft automatically produces a signal, which powers the electrical network of the passenger emergency chemical oxygen system, activating the container latches and thus causing the lids to open so that the passenger oxygen masks fall out of the containers.
The flight crew also has the possibility to activate the passenger emergency oxygen system manually from the cockpit. On the Tu–154, the power supply network of the oxygen system containers has been designed to be redundant and to provide information on the operating/serviceability status of the electrical network.
After activation of the system, the passengers in each seat block would pull one or more of the oxygen masks, thus starting the chemical oxygen generator. Then, oxygen would flow for the passengers to breathe for a certain period of time, which is sufficient for the aircraft to descend to a lower, oxygen-richer altitude.
The oxygen generator flow profile is designed to correspond to a typical aircraft emergency descent profile.
The chemical oxygen generators of DAe Systems normally used on Russian/CIS airliners have an oxygen flow duration of 15 minutes. Apart from that, a 22-minute chemical oxygen system is available — it has already been installed on board An–74TK–300 and An–26B–100 aircraft.
Emergency oxygen systems for passengers and cabin attendants that are based on chemical generators offer significant advantages in comparison with same-class gaseous oxygen systems.
Oxygen generator-based systems are:
Therefore, chemical emergency oxygen systems are extremely attractive not only to airlines, but to aircraft manufacturers as well, allowing substantial savings in costs, material, working hours and improving the dispatch reliability and overall safety of the fleets.
The passenger emergency chemical oxygen solution of DAe Systems is superior to similar equipment in many aspects. The most significant of these are:
And last, but not least: the passenger emergency oxygen system of DAe Systems is engineered and
manufactured in Germany with very high quality — in correspondence with the best German traditions.
This advantage is supplemented by the rich experience of the company based on the more than 100,000 oxygen containers
produced since 1991.
IAC Aviation Register certificates for the passenger emergency oxygen system containers of DAe Systems
Click on the container type to view its certificate (A4-sized JPEG image):
The passenger emergency chemical oxygen system of DAe Systems has all necessary approvals and certificates.
In particular, it is approved by the Moscow-based Interstate Aviation Committee (IAC) Aviation Register with issuance of Appliance Design Approvals (see left). This allows the installation of the system on any airliner produced and operated in Russia and the CIS member states.
The manufacturing of the system has also been approved by the IAC Aviation Register.
All Tu–154 aircraft equipped with the system have been retrofitted in accordance with the respective documentation of the General Designer at Tupolev PSC.
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