REG NASA-LLIS-0118-1992 Lessons Learned - Mobile Launch Platform (MLP) Air-arcing Operation.pdf

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1、Lessons Learned Entry: 0118Lesson Info:a71 Lesson Number: 0118a71 Lesson Date: 1992-07-30a71 Submitting Organization: KSCa71 Submitted by: Lisa L. MusgraveSubject: Mobile Launch Platform (MLP) Air-arcing Operation Description of Driving Event: During air-arcing operations under mobile launch platfor

2、m-1 (MLP), a welder smelled smoke through the hole he was working on and found a fire in the floor insulation of compartment 16B. Investigation revealed that air-arcing under MLP-1 ignited hydraulic fluid that had accumulated in the floor insulation of compartment 16B. Hydraulic pumping units leaked

3、 hydraulic fluid onto the insulation for several years. Hot particles released by air-arcing blew into compartment 16B as the welder penetrated the MLP bottom panel, and the fluid ignited.Lesson(s) Learned: Hydraulic fluid, dripped by hydraulic pumping units onto floor insulation may be ignited by h

4、ot particles propelled into the area during air-arcing.Recommendation(s): Design and install drain pans to catch and contain leaking hydraulic fluid beneath hydraulic components.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AProvided by IHSNot for ResaleNo reproduct

5、ion or networking permitted without license from IHS-,-,-Mission Directorate(s): N/AAdditional Key Phrase(s): a71 Facilitiesa71 Ground OperationsAdditional 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-,-,-