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Tim MarkerFAA Technical Center
Investigation of Fuselage Penetrations in BurnthroughProtected Area
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Insulation blankets in burnthrough-protected area of fuselage not 100%connected or contiguous.
Investigation of Fuselage Penetrations in BurnthroughProtected Area
Discontinuities such as slots, gaps, holes, pass-throughs, and other openingscan exist in the burnthrough protected area of the fuselage.
Investigation to focus on what is acceptable level of discontinuities toensure safety.
Findings of investigation to be implemented into advisory material.
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Example of Discontinuity in Burnthrough Protected Area
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Example of Discontinuity in Burnthrough Protected Area
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Example of Discontinuity in Burnthrough Protected Area
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Example of Discontinuity in Burnthrough Protected Area
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Development of Suitable Mock-up for Evaluating Discontinuity
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Development of Suitable Mock-up for Evaluating Discontinuity
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Initial Area to be Mocked-up
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insulation blanket
opening for flame
cargo liner
Initial Area to be Mocked-up
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cargo liner
insulation blanket
opening for flame
Formation of Mock-up
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Mock-up Box Cross Section
slot at bottom
insulation blanket
steel sides
cargo liner
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Adjustable Height Concept Mock-up Box
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Initial Mock-up Configuration Above Fire Pan
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Mock-up Box at 6 Feet Above Fire Pan
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Mock-up Box at 3 Feet Above Fire Pan
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Modified Mock-up Box Configuration
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Modified Mock-up Box Configuration
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Cargo Liner Mounted Over Opening
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Cargo Liner Mounted Over Opening
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ModifiedMock-up Box ConfigurationOver Fuel Pan
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Modified Mock-up Box Configuration
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Insulation Blanket Mounted in Mock-up
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Typical Mock-up Box Test With Materials
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Post-Test Damage to Cargo Liner
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Post-Test Damage to Cargo Liner
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Post-Test Damage to Cargo Liner
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Post-Test Damage to Cargo Liner
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Post-Test Damage to Insulation Blanket
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Steel Baffle Test (5/02/07)
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4- by 22-Inch Steel Baffle Below Opening
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Cargo LinerPost Test
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Intumescent Coated Steel Baffle (5/16/07)
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Intumescent Coated Steel Baffle (5/16/07)
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IntumescentCoated Steel
Baffle30 Seconds
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Intumescent Coated Steel Baffle Post Test
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Cargo LinerPost Test
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InsulationBlanket
Post Test
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Oversized Intumescent Coated Aluminum Baffle (6/1/07)
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6- by 24-Inch Intumescent Coated Aluminum Baffle
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Intumescent-Coated Aluminum Baffle Post Test
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Intumescent-Coated Aluminum Baffle Post Test
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Cargo Liner Post Test
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Insulation Blanket Post Test
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Summary of Full-Scale Testing of Penetrations
8 tests conducted with 2- by 20-inch opening in mock-up
Unblocked opening allows flames to enter and climb approximately 3 feet using 4-foot-high box
Unblocked opening allows flames to enter and climb up materials during modified box tests
Non-coated baffle provides marginal decrease in fire penetration
Intumescent-coated baffles limit damage to insulation blanket/cargo liner
Reduced opening size (1-inch width) provided no decrease in fire penetration