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OBIGGS Utilization In Inaccessible Areas On A Wide Body Aircraft

Federal Aviation Administration. OBIGGS Utilization In Inaccessible Areas On A Wide Body Aircraft. International Aircraft Systems Fire Protection Working Group Atlantic City, NJ November 1, 2005.

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OBIGGS Utilization In Inaccessible Areas On A Wide Body Aircraft

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  1. Federal Aviation Administration OBIGGS Utilization In Inaccessible Areas On A Wide Body Aircraft International Aircraft Systems Fire Protection Working GroupAtlantic City, NJ November 1, 2005 Steve Summer Project Engineer Federal Aviation AdministrationFire Safety Branch

  2. OBJECTIVES • Design and install an NEA distribution system for fire protection of the overhead area of the 747SP test article • Examine the effect of various conditions on the ability of the OBIGGS to successfully protect the overhead area: • Bleed air pressure • OBIGGS feed pressure • OBIGGS back pressure • Permeate pressure (altitude) • Ventilation • Etc.

  3. TEST ARTICLE • 747SP previously utilized in fuel tank inerting research efforts • OBIGGS installed in the empty pack bay utilizing 6 ASMs • Current instrumentation allows for monitoring oxygen at 12 locations • NEA flow and purity also measured as well as various system pressures

  4. TEST CONFIGURATION Current Test Section (STA 1241) From OBIGGS From OBIGGS Vacuum Source

  5. CURRENT TEST SECTION • Located at approximately STA 1241 • Approximately 20 ft. wide, 5 ft. tall at center • Cross-sectional area of approximately 42 ft2

  6. CURRENT STATUS • NEA line from OBIGGS is plumbed to overhead area • 8 oxygen sample lines located in overhead area (ability to add 4 more) • Ready to begin preliminary testing with one NEA deposit location to examine NEA spread rates • Next step is to use that data to develop distribution system

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