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NASA-LLIS-1798 : Lessons Learned - Braycote Grease retains tribological properties for 17 years in controlled storage
سازمان: NASA - National Aeronautics and Space Administration (NASA)
کلید واژه: Additional Categories. , Additional Categories.Flight Equipment , Additional Categories.Ground Equipment , Additional Categories.Packaging , Handling , Storage , Additional Categories.Spacecraft , Integration and Testing , Safety and Mission Assurance. , Safety and Mission Assurance.Maintenance
سال: 2007
زبان: English
قیمت: 290000 تومان
Abstract:
This is a lessons learned from NASA Engineering Safety Center (NESC) Technical Bulletin on Braycote Grease. Please also view attached document.
A scheduled inspection of the Rudder/Speed Brake actuators on Space Shuttle orbiter OV-103 revealed fretting corrosion, micropitting, wear and discoloration of the lubricant Braycote 601. A decision was made to replace the actuators with the existing spares, a single ship set which had been in controlled storage for the past 17 years. Data did not exist on the lubricity of Braycote 601 grease after extended storage. Based on testing data, there is no significant difference in lubricity due to separated or degraded grease and no evidence that the grease will degrade at steady state in ambient temperatures.
NASA-LLIS-1798 : Lessons Learned - Braycote Grease retains tribological properties for 17 years in controlled storage
سازمان: NASA - National Aeronautics and Space Administration (NASA)
کلید واژه: Additional Categories. , Additional Categories.Flight Equipment , Additional Categories.Ground Equipment , Additional Categories.Packaging , Handling , Storage , Additional Categories.Spacecraft , Integration and Testing , Safety and Mission Assurance. , Safety and Mission Assurance.Maintenance
سال: 2007
زبان: English
قیمت: 290000 تومان
Abstract:
This is a lessons learned from NASA Engineering Safety Center (NESC) Technical Bulletin on Braycote Grease. Please also view attached document.
A scheduled inspection of the Rudder/Speed Brake actuators on Space Shuttle orbiter OV-103 revealed fretting corrosion, micropitting, wear and discoloration of the lubricant Braycote 601. A decision was made to replace the actuators with the existing spares, a single ship set which had been in controlled storage for the past 17 years. Data did not exist on the lubricity of Braycote 601 grease after extended storage. Based on testing data, there is no significant difference in lubricity due to separated or degraded grease and no evidence that the grease will degrade at steady state in ambient temperatures.
