REG NASA-LLIS-0513-1994 Lessons Learned - Moisture Contamination from the Initial Electronically Scanned Pressure (ESP) Systems Module Destroyed all Remaining ESP Modules.pdf

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1、Lessons Learned Entry: 0513Lesson Info:a71 Lesson Number: 0513a71 Lesson Date: 1994-07-29a71 Submitting Organization: LARCa71 Submitted by: Bernard LewisSubject: Moisture Contamination from the Initial Electronically Scanned Pressure (ESP) Systems Module Destroyed all Remaining ESP Modules Descripti

2、on of Driving Event: N/ALesson(s) Learned: The reference cavities for all ESP modules are connected to a common vacuum source; if this common vacuum source becomes contaminated with moisture from the initial ESP module all remaining ESP modules can be destroyed.Recommendation(s): 1. Ensure that high

3、 pressure tubes are correctly connected to the proper high pressure module ports by maintaining thorough tube labeling and verifying that tubes are labeled correctly after every instrumentation change.2. Examine tubing paths between measurement orifices and sensor ports, looking for potential interf

4、aces with fluids other than dry, clean, inert gas.3. Always leak check sensors with vacuum only.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 Directorate(s): N

5、/AAdditional Key Phrase(s): a71 Environmenta71 HardwareAdditional Info: Approval Info: a71 Approval Date: 1997-04-02a71 Approval Name: Elijah C. Kenta71 Approval Organization: 421a71 Approval Phone Number: 757-864-3345Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-

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