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Progress and Current Status of Aircraft Fire Protection Systems

This article provides updates on the progress and current status of the aircraft fire protection systems, including topics like fire extinguisher test section, gas analyzer, and nacelle halon replacement. It also discusses the repairs and modifications being made to various components of the system.

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Progress and Current Status of Aircraft Fire Protection Systems

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  1. International Aircraft Systems Fire Protection Working Group Wilson, NC 17-18July2001 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ 08405 USA Engine Nacelle Halon Replacement,FAA, WJ Hughes Technical Center Point of Contact : Doug Ingerson Department of Transportation Federal Aviation Administration WJ Hughes Technical Center Fire Safety Section, AAR-422 Bldg 205 Atlantic City Int'l Airport, NJ 08405 USA tel: 609-485-4945 fax: 609-485-7074 email: Douglas.A.Ingerson@tc.faa.gov web page: http://www.fire.tc.faa.gov/

  2. International Aircraft Systems Fire Protection Working Group Wilson, NC 17-18July2001 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ 08405 USA PROGRESS/CURRENT STATUS Three Major Topics for Review : Fire Extinguisher Test Section Gas Analyzer

  3. International Aircraft Systems Fire Protection Working Group Wilson, NC 17-18July2001 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ 08405 USA • PROGRESS/CURRENT STATUS • Fire Extinguisher • Equilibrium subsystem being added • N2/agent mixture will be stabilized in this subsystem and then moved into the firex for pretest conditioning • the N2/agent solubility interaction will attain completion in a more controlled manner • removes the interaction from the detrimental exposure of the temperature extremes found in the firex • will minimize a circumstance potentially capable of producing inconsistent test results • Firex leak identified • bad seals found in the 1-1/4” releasing valve (pneumatically operated ball valve) • repair kit ordered; due on-site by Aug ‘01 • repair will be performed immediately upon receipt of parts

  4. International Aircraft Systems Fire Protection Working Group Wilson, NC 17-18July2001 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ 08405 USA PROGRESS/CURRENT STATUS Fabricating the equilibrium subsystem

  5. International Aircraft Systems Fire Protection Working Group Wilson, NC 17-18July2001 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ 08405 USA • PROGRESS/CURRENT STATUS • Test Section • Spray hot plate failed 8May01 during warm-up for fire sensitivity evaluations • problem found and corrected • pool hot plate corrected also • operational once again 20June01 • Fuel flow characterization for the spray and pool fire scenarios underway

  6. International Aircraft Systems Fire Protection Working Group Wilson, NC 17-18July2001 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ 08405 USA • PROGRESS/CURRENT STATUS • Test Section (continued) • Fire sensitivity evaluations to occur for both fire scenarios between now and 10October01 • purpose • rank combustion intensity dependent upon varying configurations for each fire scenario • provide experience with the fire scenarios • potentially ease the search for a “robust fire” • the evaluation of the residual scenario will include considerations for : • freeboard (lip) height above the fuel • pool surface area • the orientation of the pool surface area • the evaluation of the spray scenario will focus on the combustion intensity as a function of the spatial relationship between the fuel nozzles and the associated engine core rib located downstream

  7. PROGRESS/CURRENT STATUS • Halonyzer II Modification • Currently on-going • problem solved • current device acceptably behaved during recent bench-top evaluation • the final configuration of the device is in fabrication • expect operational device in 4-6 weeks • Calibration to be accomplished after device is completely assembled • Device maintains original design concept • no excessive proof-of-concept required • no difficulty expected in acquiring test data International Aircraft Systems Fire Protection Working Group Wilson, NC 17-18July2001 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ 08405 USA

  8. International Aircraft Systems Fire Protection Working Group Wilson, NC 17-18July2001 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ 08405 USA PROGRESS/CURRENT STATUS Bench-top configuration of the “new” analyzer

  9. 10.5” 20.4” 17.8” International Aircraft Systems Fire Protection Working Group Wilson, NC 17-18July2001 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ 08405 USA PROGRESS/CURRENT STATUS Perspective View, New Connectivity Box for the Halonyzer II

  10. Signal handling circuitry Cooling fan A-D boards Releasing Controls Power Supply International Aircraft Systems Fire Protection Working Group Wilson, NC 17-18July2001 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ 08405 USA PROGRESS/CURRENT STATUS Internal View, New Connectivity Box for the Halonyzer II

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