1、Lessons Learned Entry: 0111Lesson Info:a71 Lesson Number: 0111a71 Lesson Date: 1992-08-27a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: LH2 Quick Disconnects (QD) Description of Driving Event: Quick disconnects, utilized for providing gasses to the space shuttle main engi
2、ne drying/purge lines and the main propulsion system LH2 prepressurization system are identical and can be cross-connected in the OPF. The MPS heated GN2 purge panel provides heated or unheated GN2 at 645 +/- 65 psig for engine drying. Should GN2 645 +/- 65 psig be introduced to the GH2 prepressuriz
3、ation system, flight hardware damage could occur. This condition may or may not be visible on the firing room pressure gages depending upon the status of orbiter power.Lesson(s) Learned: Quick disconnects utilized for providing gasses to the space shuttle main engine (SSME) are identical to each oth
4、er and can be cross-connected.Recommendation(s): Modify (KEY) one quick disconnect to prevent misconnection.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Mission Direc
5、torate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Facilitiesa71 Ground Operationsa71 Ground Equipmenta71 Human Factorsa71 Launch Processa71 Launch VehicleAdditional 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-,-,-
