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NASA-LLIS-6148: Lessons Learned - Continuous Hazardous Gas Monitoring In The Shuttle Aft During Flight
Abstract: The Space Shuttle Orbiter aft hazardous gas grab bottles provided an indication of gas leak in specific locations in the Orbiter during ascent and data was obtained post mission. Future vehicles need to include real-time ...
NASA-LLIS-6149: Lessons Learned - Don’t Purge Dead-Headed Hydrogen Lines With Helium Downstream Of Source
Abstract: Residual hydrogen in the fill and drain line during the terminal count down sequence could lead to a catastrophic failure. The best practice is to connect the purge line to the propellant line as closely as possible to the ...
NASA-LLIS-6146: Lessons Learned - Absence Of Explicitly Defined Fluid Property/Composition At The Vehicle/Engine Interface
Abstract: Design of vehicle propulsion systems requires explicit definition of fluid properties across component interfaces to ensure safety and reliability. The propellant delivery system components are designed and verified to ...