1、Lessons Learned Entry: 0036Lesson Info:a71 Lesson Number: 0036a71 Lesson Date: 1992-09-18a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Back Pressure Regulator Description of Driving Event: The T-0 vent support assemblies are mounted on the orbiter T-0 Interface to suppor
2、t controlled venting of PRSD tanks after landing. In the event of regulator diaphragm failure, GH2 or GO2 can vent to atmosphere near the orbiter through the back pressure regulators. Leaking GH2 could cause a fire or explosion. Leaking GO2 could contribute to failure of the diaphragm in the back pr
3、essure regulator of the FCSS, PRSD T-0 safing system could release GH2 in the vicinity of the orbiter.Lesson(s) Learned: Failure of the diaphragm in the back pressure regulator of the FCSS, PRSD T-0 safing system could release GH2 in the vicinity of the orbiter.Recommendation(s): Install an isolatio
4、n valve upstream of the back pressure regulator, thereby allowing manual vent line pressure regulation.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AMission Directorat
5、e(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Energetic Materials - Explosive/Propellant/Pyrotechnica71 Facilitiesa71 Flight Equipmenta71 Ground Operationsa71 Ground Equipmenta71 Hardwarea71 Hazardous/Toxic Waste/Materialsa71 Launch Vehiclea71 Parts Materials & Processesa71 Pressure VesselsAdditional Info: Approval Info: a71 Approval Date: 1994-06-01a71 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-,-,-
