1、Lessons Learned Entry: 0613Lesson Info:a71 Lesson Number: 0613a71 Lesson Date: 1997-04-20a71 Submitting Organization: HQa71 Submitted by: Miles WhitnahSubject: Solid Rocket Booster, Bonding Material Process Description of Driving Event: To meet environmental requirements, a program decision was made
2、 to change the Pressure Sensitive Adhesive used in the J-flap of the segment of the Shuttle Reusable Solid Rocket Motor (RSRM) and the solvent used in the joint cleaning process. A new Pressure Sensitive Adhesive was acquired and a solvent-based cleaning wipe was replaced with an aqueous-based joint
3、 cleaning process. Post flight analysis of the RSRM flight article revealed greater than expected erosion, sooting and heat effects on the insulation interfaces.Lesson(s) Learned: RSRM joint cleaning wipe was replaced with an aqueous-based solvent that was determined to be inappropriate for the expe
4、cted joint interface surface temperatures.Recommendation(s): Emulating the flight conditions, perform finite testing and analysis of any manufacturing, material and process changes.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AProvided by IHSNot for ResaleNo reprod
5、uction or networking permitted without license from IHS-,-,-Mission Directorate(s): N/AAdditional Key Phrase(s): a71 Environmenta71 Parts Materials & ProcessesAdditional Info: Approval Info: a71 Approval Date: 1999-03-31a71 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-,-,-
