1、Lessons Learned Entry: 0329Lesson Info:a71 Lesson Number: 0329a71 Lesson Date: 1993-06-11a71 Submitting Organization: MSFCa71 Submitted by: Fisher, MarkSubject: Insulation, Solid Rocket Motor Case, Bonding, Effect of Contamination Description of Driving Event: Loss of ChallengerLesson(s) Learned: Th
2、e potential exists for contamination on rocket motor case walls, which can interfere with bonding of insulation.Recommendation(s): Assure that contamination on internal rocket motor case walls is acceptably low by (1) performing bonding tests on “witness“ samples which have been subjected to the sam
3、e processes as the flight hardware, and, (2) inspecting the case walls by techniques such as ultraviolet light to determine if the cleanliness level is equal to or better than the witness samples.Evidence of Recurrence Control Effectiveness: Self-evident that a clean surface will provide a better bo
4、nd than a contaminated surfaceDocuments Related to Lesson: N/AMission Directorate(s): Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AAdditional Key Phrase(s): a71 Flight Equipmenta71 Hardwarea71 Parts Materials & Processesa71 Safety & Mission Assurancea71 Test & VerificationAdditional Info: Approval Info: a71 Approval Date: 1993-06-11a71 Approval Name: Fisher, Marka71 Approval Organization: EP22a71 Approval Phone Number: 205-544-9503Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
