Overview of Fuel Tank Flammability Reduction Rule Fuel
Overview of Fuel Tank Flammability Reduction Rule Fuel Tank Flammability Workshop- Fire Safety Conference 9/10/2021 Atlantic City October 2010 Federal Aviation Administration 1 1
Fuel Tank Flammability Reduction Rule Part 25 Rules Amendment 25 -125 Subpart E- Powerplant § 25. 981 Fuel Tank Ignition Prevention Appendix M Fuel Tank Flammability Exposure Requirements Appendix N Fuel Tank Flammability Exposure Analysis Part 26 Rules § 26. 33 Holders of Type Certificates § 26. 35 Changes to Type Certificates § 26. 37 Pending Type Certification Projects § 26. 39 Production Certificate Holders Fuel Tank Flammability Workshop- Fire Safety Conference 9/10/2021 Atlantic City October 2010 Operations Rules § 121. 1117 (FRM) § 125. 509 (FRM) § 129. 117 (FRM) Federal Aviation Administration 2 2
New Rule Requires… • Part 25 Certification Standards – New Section 25. 5 - Incorporation by Reference • Incorporates “Fuel Tank Flammability Assessment Method User’s Manual” for § 25. 981 and Appendix N – Amends Section 25. 981 • Replaces amd. 25 -102 “minimize” fuel tank flammability standard with limits for all fuel tank types – Main tanks and external Normally Emptied fuel tanks - 3% Fleet Average Flammability Exposure or (equivalent) conventional unheated aluminum wing tank – Normally Emptied any part located inside fuselage - Appendix M requirements » 3% Fleet Average Flammability Exposure and 3% warm day • Adds fuel tank flammability airworthiness limitation requirement – New Appendices to Part 25 • Appendix M – Fuel Tank System Flammability Reduction Means • Appendix N - Fuel Tank Flammability Exposure and Reliability Analysis Fuel Tank Flammability Workshop- Fire Safety Conference 9/10/2021 Atlantic City October 2010 Federal Aviation Administration 3 3
New Rule Requires… (continued) • Part 26 Design Approval Holder (DAH) Rule – Flammability analysis of all fuel tanks in large transports – Flammability airworthiness limitations required for all TC Holder’s fuel tanks – FRM service instructions from TC Holder’s for all “high flammability tanks” • Any tank Above 7 percent reduced to below 3 percent average • 3 percent warm day applies to Normally Emptied tanks if any part located inside fuselage – FRM on new production airplane with high flammability fuel tanks – STC and field approved auxiliary tanks require design change if existing design compromises CDCCL for TC holder tank with FRM – Pending Type Certification Projects - (e. g. A 350, 787). Flammability require compliance to amd. 25 -125 Fuel Tank Flammability Workshop- Fire Safety Conference 9/10/2021 Atlantic City October 2010 Federal Aviation Administration 4 4
New Rule Requires… (continued) • Operational Rules (Parts 121, 125 and 129) – Passenger Use Airplanes • Retrofit of 1992 and newer passenger airplanes in fleet – 50% after 6 years, – 100% after 9 years. • Any pre 1992 airplane in passenger use must have FRM 9 years after effective date • 1 year extension in compliance time provided if ground air use implemented when available at the gate • Once installed, FRM must be operational and maintained per TC holder’s airworthiness limitations. – Cargo Airplanes • All newly delivered passenger and cargo airplanes to have FRM 2 years after effective date. • Any passenger airplanes converted to cargo must maintain FRM Fuel Tank Flammability Workshop- Fire Safety Conference 9/10/2021 Atlantic City October 2010 Federal Aviation Administration 5 5
Timeline for DAH and Operators 12/2008 12/2010 12/2014 12/2015 12/2017 12/2018 Expected 25 years in passenger service Fuel Tank Flammability Workshop- Fire Safety Conference 9/10/2021 Atlantic City October 2010 Federal Aviation Administration 6 6
Guidance Material • AC 25. 981 -2 A Fuel Tank Flammability Reduction Means • AC 120 -98 Operator Requirements for Incorporation of Fuel Tank Flammability Reduction Requirements Fuel Tank Flammability Workshop- Fire Safety Conference 9/10/2021 Atlantic City October 2010 Federal Aviation Administration 7 7
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