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GB/T 35794-2018: Safety design for oxygen system of civil aircraft
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GB/T 35794-2018: Safety design for oxygen system of civil aircraft

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Safety design for oxygen system of civil aircraft ICS 49.095 V44 National Standards of People's Republic of China Civil aircraft oxygen system safety design Published on.2018-02-06 2018-09-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration released Directory Preface I 1 Scope 1 2 Normative references 1 3 Abbreviations 1 4 Design Criteria 1 5 Design Requirements 2 5.1 General requirements 2 5.2 Detailed Requirements 3 5.3 Installation Requirements 4 6 Design Method 5 7 Design Verification 5 7.1 Confirmation 5 7.2 Verification 6

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by China Aviation Industry Corporation. This standard is under the jurisdiction of the National Aircraft Standardization Technical Committee (SAC/TC435). This standard was drafted by. Hefei Jianghang Aircraft Equipment Co., Ltd., China Commercial Aircraft Co., Ltd. Shanghai Aircraft Design and Research Institute, China Aviation Comprehensive Technology Institute. The main drafters of this standard. Fang Ling, Li Xin, Zhao Hongyi, Yu Weidong, Peng Guangmei, Jin Huijie, Yang Bao, Wang Huidan, Jin Hui, Guo Yaodong. Civil aircraft oxygen system safety design

1 Scope

This standard specifies the safety design guidelines, design requirements, design methods and design verification for civil aircraft oxygen systems. This standard applies to the safety design of civil aircraft oxygen systems.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the dated version is adapted to this article In the case of undated references, the latest version (including all amendments) applies to this document. CCAR25 China Civil Aviation Regulations Part 25 Airworthiness Standards for Transport Aircraft SAEARP4761 Guidelines and Methods for the Safety Assessment Process of Airborne Systems and Equipment for Civil Aircraft (Guidelinesand Methodsforconductingthesafetyassessmentprocessoncivilairbornesystemsandequipment)

3 Abbreviations

The following abbreviations apply to this document. CCA---Common Cause Analysis (CommonCauseAnalysis) FHA - Functional Hazard Assessment FMEA - Failure Mode and Effect Analysis (FailureModeandEffectAnalysis) FTA---FaultTreeAnalysis PSSA---Preliminary System Safety Assessment SSA---SystemSafetyAssessment

4 Design Guidelines

Oxygen system safety design should generally follow the following design criteria. a) The oxygen system should be designed and installed to perform its intended function under various environmental conditions in which the aircraft is operating. b) Oxygen systems and related components, when considered separately or together with other systems, should be designed and installed to. Every catastrophic Failure conditions are extremely unlikely (< 10-9) and will not be caused by a single failure; each dangerous failure condition is minimal Possible (< 10-7); Each major failure condition is very unlikely (< 10-5). c) For the unsafe working conditions of the oxygen system caused by the following failure events, the system shall adopt failure monitoring and warning measures, and shall Information is provided to the crew so that the crew can take appropriate corrective action. This failure event is part of potentially disastrous consequences. This failure event combined with other potential secondary failure events or previous events can result in a catastrophic failure state. If needed If corrective actions are taken immediately, warning instructions should be provided. Systems and controls, including instructions and notices, should be designed to make Unit errors that may cause additional danger are minimized. d) When the failure display device or monitoring instrument of the oxygen system fails, it shall not affect the safety of the aircraft and the normal operation of the system. e) The system design stage should be based on aircraft-level FHA system-level FHA, determine the aircraft oxygen system, subsystems, equipment and components The safety requirements to be met. ...