1、Public Lessons Learned Entry: 6342 Lesson Info: Lesson Number: 6342 Lesson Date: 2010-06-8 Submitting Organization: JSC Submitted by: Edward Burns Subject: Importance of Detailed Post-Flight Reconstruction and Performance Assessment During the Life of a Flight Program Abstract: During some periods o
2、f the Space Shuttle Program, post-flight reconstruction and performance assessment were reduced as a cost saving measure. This reduction in the scope and detail of post-flight reconstruction and performance assessment precluded the detection of inaccuracies in the definition of induced environments
3、for the design of the Space Shuttle vehicle. Description of Driving Event: During the post-flight reconstruction of STS-133, it was observed that the calculated aerodynamic heating exceeded the design environments for several body points on the external tank and the orbiter during second stage fligh
4、t. It was determined that there had been a software error in the rarefied gas heating model used during certification that resulted in the aerodynamic heating being understated for off-nominal vehicle attitudes. The aerodynamic heating environments were updated for these vehicle elements for subsequ
5、ent flights. Lesson(s) Learned: Detailed post-flight reconstruction and performance assessment is necessary to ensure the adequacy of the space vehicle design environments and the sustained safe performance of the vehicle. Recommendation(s): Do not prematurely reduce the scope and depth of post flig
6、ht reconstruction and performance assessment for long duration space launch programs. Evidence of Recurrence Control Effectiveness: N/A Documents Related to Lesson: N/A Mission Directorate(s): Space Operations Additional Key Phrase(s): Long term sustainability and maintenance planning Affect of Cult
7、ural factors on long-term human and robotic missions Program Management Risk management Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Long term sustainability and maintenance planning Systems analysis - cost analysis Review systems and boards Additional Info: Project: Space Shuttle Approval Info: Approval Date: 2012-08-22 Approval Name: mbell Approval Organization: HQ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
