OBIGGS Utilization In Inaccessible Areas On A Wide

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

OBJECTIVES • Design and install an NEA distribution system for fire protection of the overhead area of the 747 SP 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. OBIGGS Utilization In Inaccessible Areas On A Wide Body Aircraft November 1, 2005 Federal Aviation Administration 1 1

TEST ARTICLE • • • 747 SP 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 • OBIGGS Utilization In Inaccessible Areas On A Wide Body Aircraft November 1, 2005 NEA flow and purity also measured as well as various system pressures Federal Aviation Administration 2 2

TEST CONFIGURATION Current Test Section (STA 1241) From OBIGGS Vacuum Source OBIGGS Utilization In Inaccessible Areas On A Wide Body Aircraft November 1, 2005 Federal Aviation Administration 3 3

CURRENT TEST SECTION • Located at approximately STA 1241 • Approximately 20 ft. wide, 5 ft. tall at center • Cross-sectional area of approximately 42 ft 2 OBIGGS Utilization In Inaccessible Areas On A Wide Body Aircraft November 1, 2005 Federal Aviation Administration 4 4

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 OBIGGS Utilization In Inaccessible Areas On A Wide Body Aircraft November 1, 2005 Federal Aviation Administration 5 5