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Engine Nacelle Halon Replacement

Engine Nacelle Halon Replacement. International Aircraft Systems Fire Protection Working Group. Mr. David Blake for Douglas Ingerson, Engineer Federal Aviation Administration WJ Hughes Technical Center Fire Safety Team Atlantic City Int’l Airport, NJ USA tel : 609-485-4945

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Engine Nacelle Halon Replacement

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  1. Engine Nacelle Halon Replacement International Aircraft Systems Fire Protection Working Group Mr. David Blake for Douglas Ingerson, Engineer Federal Aviation Administration WJ Hughes Technical Center Fire Safety Team Atlantic City Int’l Airport, NJ USA tel : 609-485-4945 email : Douglas.A.Ingerson@faa.gov 2April2008

  2. Presentation Overview • Revise the Minimum Performance Standard for Engine Nacelles and APU Compartments (MPSe) • Currently known as revision 3 • Will remove Halon 1301 fire test requirement • With Halon 1301 removal, revision 4 results

  3. MPSe, Revision 3 • Fire testing required for Halon 1301 and replacement candidate • Successful quantity of replacement candidate : • is established by fire test • demonstrates parity with Halon 1301 fire test results • is likely found by iterative process • Equivalent concentration established from the distribution of the successful replacement candidate

  4. MPSe Revision 3 – Schematic flow FIRE TEST WITH REPLACEMENT CANDIDATE FIRE TEST WITH HALON 1301 Repeated 4 times; 4 conditions of 2 ventilation regimes & 2 fire threats COMPARE HALON 1301 & CANDIDATE BEHAVIORS ESTABLISH EQUIVALENT CONCENTRATION IF FAVORABLE IF UNFAVORABLE QUANTIFY DISTRIBUTION BEHAVIOR OF THE SUCCESSFUL CANDIDATE

  5. MPSe, Revision 4 – Preliminary Thoughts • Remove fire testing required for Halon 1301 • utilize a surrogate for Halon 1301 • maintain relation to historical Halon 1301 results • Optimize process based on past experiences with HFC-125, CF3I, & FK-5-1-12

  6. MPSe, Revision 4 – Preliminary Thoughts • Suspected equivalent concentration : • must be known by representative prior to MPSe testing • must be distributed in the test fixture prior to MPSe testing • Successful quantity of replacement candidate : • will remain proven by fire test for the 4 conditions • if suspected equivalent concentration fails, will be found by iterative process of rev03

  7. FIRE TEST WITH REPLACEMENT CANDIDATE FIRE TEST WITH SURROGATE COMPARE SURROGATE & CANDIDATE BEHAVIORS ESTABLISH EQUIVALENT CONCENTRATION IF UNFAVORABLE IF FAVORABLE QUANTIFY DISTRIBUTION BEHAVIOR OF THE SUCCESSFUL CANDIDATE IF FAVORABLE SUCCESS ESTABLISHED MPSe Revision 4 – Preliminary schematic flow

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