1、Lessons Learned Entry: 0079Lesson Info:a71 Lesson Number: 0079a71 Lesson Date: 1992-05-20a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: LH2 Flow Test at the LETF Description of Driving Event: During preparation for LH2 flow test at the LETF, a section of line was inadvert
2、ently over-pressurized, resulting in a protective cap being blown approximately 350 feet away. Post- mishap troubleshooting disclosed that the hazardous GN2 purge orifice at valve A89406 was blocked by corrosion and foreign contamination.Lesson(s) Learned: Post mishap troubleshooting disclosed that
3、the hazardous GN2 purge orifice at valve A89406 was blocked resulting in over-pressurization of the system.Recommendation(s): Provide a pressure relief valve in this area of the system.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): Provided b
4、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AAdditional Key Phrase(s): a71 Ground Equipmenta71 Hardwarea71 Pressure Vesselsa71 Safety & Mission AssuranceAdditional Info: Approval Info: a71 Approval Date: 1994-06-02a71 Approval Name: James G. Klinea71 Approval Organization: KSC/HEIa71 Approval Phone Number: 407-867-7614Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
