1、Lessons Learned Entry: 1008Lesson Info:a71 Lesson Number: 1008a71 Lesson Date: 1997-02-01a71 Submitting Organization: HQa71 Submitted by: David M. LengyelSubject: Space Shuttle Program/Reusable Solid Rocket Motor (RSRM)/Manufacturing & Process Control and Certification Testing Description of Driving
2、 Event: Environmental Regulations Resulting in Manufacturing Process and Test Certification Changes for RSRMLesson(s) Learned: There are many material and process changes in work for the RSRM in response to both environmental regulations and obsolescence issues. A vital part of the certification pro
3、gram for these changes is the demonstration of the acceptability of the changes during an FSM firing. At present, FSM firings are scheduled at 2-year intervals instead of the 1-year or 18-month intervals previously used.Recommendation(s): Considering the large number of changes in RSRM materials and
4、 processes and the importance of proper simulation of operating conditions in any certification test program, NASA should reevaluate its decision to have 2 years between FSM firings.Evidence of Recurrence Control Effectiveness: The RSRM project presented an assessment of static test motor frequency
5、to the PRCB on February 27, 1997, and recommended static tests at 1-year intervals. The recommendation was accepted by the PRCB. An initiative is under way to ensure that the maximum possible benefit is obtained from each test.Provided by IHSNot for ResaleNo reproduction or networking permitted with
6、out license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Aerospace Safety Advisory Panela71 Environmenta71 Energya71 Ground Operationsa71 Hazardous/Toxic Waste/Materialsa71 Policy & Planninga71 Safety & Mission Assurancea71 Test & VerificationAdditional Info: Approval Info: a71 Approval Date: 2001-11-01a71 Approval Name: Bill Loewya71 Approval Organization: QSa71 Approval Phone Number: 202-358-0528Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
