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SAE ARP6078
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SAE ARP6078 2012 Edition, October 1, 2012
Aircraft Fuel Tank Inerting Systems
Description / Abstract:
The Aerospace Recommended Practices of this document are
intended for nitrogen-based Flammability Reduction Means (FRM)
implemented on transport category, turbine powered airplanes. The
recommended practices herein, therefore, relate only to the
transport category aircraft, and focus specifically on contemporary
inerting systems equipment. Such systems are referred to a Fuel
Tank Inerting Systems (FTIS) in this document. This document does
not cover the following:
• Military aircraft applications
• Air separation technologies other than hollow fiber membrane (HFM) and pressure swing adsorption (PSA)
• Inerting of conventional unheated wing tanks or aircraft dry bays
• Expected future technology solutions for the generation of inert gas.
The advice contained in this document is aimed towards providing aircraft manufacturers with guidance on the key issues associated with contemporary aircraft fuel tank inerting systems to supplement the guidance in FAA Advisory Circular AC 25.981-2. This document also provides system and component designers and manufacturers with advice on what aspects must be evaluated and addressed when designing a safe, low risk solution for transport aircraft fuel tank Flammability Reduction Means. As such, the information herein is intended as a guide for some system design aspects, but primarily identifies the issues which must be addressed in designing an inerting system for fuel tank flammability reduction.
Purpose
This SAE Aerospace Recommended Practice (ARP) provides guidance for the design, development and certification of an aircraft fuel tank inerting system (FTIS) and will provide technical references and data regarding an FTIS. The intent of this ARP is to address issues associated with the requirements of the current regulations for aircraft fuel tank flammability at the time of initial release of this document in 2012. As such, it focuses specifically on the FAA requirements of 14CFR 25.981 and appendices M and N of 14 CFR part 25, and also similar regulations from EASA.
This ARP provides guidance on the two types of fuel tank inerting systems that have been selected by the industry as the potential designs for a fuel tank flammability reduction means. Design guidelines for qualification, installation and system performance of the fuel tank inerting system are addressed in this document.
Further, this ARP attempts to provide guidance to support the use of an FTIS to meet the intent of AC 25.981-2 introduced at amendment 125 (14 CFR 25.981 amendment 25-125) for fuel tank explosion prevention (including a summary and utilization of appendix M and appendix N of the regulation). The ARP documents the process for determining fleet average flammability exposure using the FAA Monte Carlo Analysis tool and how fuel tank system flammability reduction means is used in this analysis.
• Military aircraft applications
• Air separation technologies other than hollow fiber membrane (HFM) and pressure swing adsorption (PSA)
• Inerting of conventional unheated wing tanks or aircraft dry bays
• Expected future technology solutions for the generation of inert gas.
The advice contained in this document is aimed towards providing aircraft manufacturers with guidance on the key issues associated with contemporary aircraft fuel tank inerting systems to supplement the guidance in FAA Advisory Circular AC 25.981-2. This document also provides system and component designers and manufacturers with advice on what aspects must be evaluated and addressed when designing a safe, low risk solution for transport aircraft fuel tank Flammability Reduction Means. As such, the information herein is intended as a guide for some system design aspects, but primarily identifies the issues which must be addressed in designing an inerting system for fuel tank flammability reduction.
Purpose
This SAE Aerospace Recommended Practice (ARP) provides guidance for the design, development and certification of an aircraft fuel tank inerting system (FTIS) and will provide technical references and data regarding an FTIS. The intent of this ARP is to address issues associated with the requirements of the current regulations for aircraft fuel tank flammability at the time of initial release of this document in 2012. As such, it focuses specifically on the FAA requirements of 14CFR 25.981 and appendices M and N of 14 CFR part 25, and also similar regulations from EASA.
This ARP provides guidance on the two types of fuel tank inerting systems that have been selected by the industry as the potential designs for a fuel tank flammability reduction means. Design guidelines for qualification, installation and system performance of the fuel tank inerting system are addressed in this document.
Further, this ARP attempts to provide guidance to support the use of an FTIS to meet the intent of AC 25.981-2 introduced at amendment 125 (14 CFR 25.981 amendment 25-125) for fuel tank explosion prevention (including a summary and utilization of appendix M and appendix N of the regulation). The ARP documents the process for determining fleet average flammability exposure using the FAA Monte Carlo Analysis tool and how fuel tank system flammability reduction means is used in this analysis.
SAE ARP6078 2012 Edition, October 1, 2012
Aircraft Fuel Tank Inerting Systems