1、Lessons Learned Entry: 1213Lesson Info:a71 Lesson Number: 1213a71 Lesson Date: 1999-06-07a71 Submitting Organization: JSCa71 Submitted by: Jeff Dutton/ Ronald A. MontagueSubject: Configuration Control at All Levels of Change Description of Driving Event: The trunnion covers used to support Extra-veh
2、icular activity (EVA) were reportedly altered late in the flow of STS-88 preparations. The modification included the addition of a tether point and changing a part number. The part number was used in the EVA checklist to allow the crew to properly determine on which cover to install each trunnion; t
3、he changed part number was not picked up for the checklist. This change resulted in confusion during EVA-2. Additionally, the tether point was not included in the NBL mockups.While implementing this Lessons Learned, it was further reported the change to the trunnion covers developed out of a fit che
4、ck done at KSC with a VITT representative from the Crew Office in attendance. Velcro was added to the cover to make it fit better per ECP BHE 1780 (Note: the tether points have been in the design of the trunnion covers since June of 1997 although they were not included in the NBL mockup). Additional
5、ly, as part of the coordination on this change, photographs of the before and after covers were taken in the Huntsville shop and sent to Houston. This information further underscores the breakdown in the configuration control processes within the program.)Root cause: Lack of configuration control pr
6、ocesses for changes that do not require Program level change requests.Lesson(s) Learned: Configuration control processes must account for all levels of authorized changes and provide feedback to affected program elements including training and operations.Recommendation(s): Provided by IHSNot for Res
7、aleNo reproduction or networking permitted without license from IHS-,-,-There were no recommendations as the information provided revealed an ongoing series of issues with configuration control. The depth and breadth of this lesson illustrates the need for configuration control at all times across t
8、he boundaries of the immediate activity and the need to plan for sharing information with unanticipated customers. Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Facilitiesa71 Flight Equipmenta71 Flight Operat
9、ionsa71 Ground Equipmenta71 Ground Operationsa71 Hardwarea71 Independent Verification and Validationa71 Industrial Operationsa71 Parts Materials & Processesa71 Policy & Planninga71 Risk Management/Assessmenta71 Safety & Mission Assurancea71 Softwarea71 Spacecrafta71 Test & Verificationa71 Test Artic
10、lea71 Test FacilityAdditional Info: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval Info: a71 Approval Date: 2002-06-17a71 Approval Name: Ronald A. Montaguea71 Approval Organization: JSCa71 Approval Phone Number: 281-483-8576Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
