1、Lessons Learned Entry: 0961Lesson Info:a71 Lesson Number: 0961a71 Lesson Date: 1995-05-15a71 Submitting Organization: MSFCa71 Submitted by: Billy Cole / RetiredSubject: Space Shuttle Main Engine (SSME) Component Test Facility: Simplicity of Design Description of Driving Event: The SSME turbobpump te
2、st stand had approximately 2,000 valves, two dozen, which were servo-operated. Facility preburner valves weighed as much as 5 tons for the 14,000 psi system. Facility problems were abundant. In one test, for example, a facility rotary flowmeter failed, releasing flowmeter blades into the LOX flow st
3、ream, causing a fire. A similar failure also occurred on a fuel facility subsystem.Lesson(s) Learned: Avoiding overcomplexity of component test facilities prevents many potential engine component failures.Recommendation(s): Provide simple, straightforward, well-designed, component test facilities wh
4、ich themselves are made up of well proven and reliable components. Reduce the number and complexity of components and instrumentation devices to the minimum required to obtain essential engine performance data.Evidence of Recurrence Control Effectiveness: The Space shuttle Main Engines have operated
5、 successfully in over 68 flights. Although many minor changes have been made to improve performance and reliability, this lesson learned or feature described has continued to sustain reliable performance in over 200 flight performances of individual engines.Documents Related to Lesson: Provided by I
6、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Configuration Managementa71 Cryogenic Systemsa71 Ground Equipmenta71 Hardwarea71 Launch Vehiclea71 Parts Materials
7、& Processesa71 Safety & Mission Assurancea71 Spacecrafta71 Test Articlea71 Test FacilityAdditional Info: Approval Info: a71 Approval Date: 2001-07-23a71 Approval Name: Eric Raynora71 Approval Organization: QSa71 Approval Phone Number: 202-358-4738Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
