REG NASA-LLIS-1718-2004 Lessons Learned - Facilities Installation and Maintenance Records as Government Property.pdf
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1、Lessons Learned Entry: 1718Lesson Info:a71 Lesson Number: 1718a71 Lesson Date: 2004-10-1a71 Submitting Organization: JSCa71 Submitted by: Ron Montaguea71 POC Name: Shelia Powella71 POC Email: shelia.k.powellnasa.gova71 POC Phone: 281-483-3142Subject: Facilities Installation and Maintenance Records a
2、s Government Property Abstract: Loss of maintenance schedules during contract turnover led to omission of panel from inspection schedule, increasing risk.Description of Driving Event: An electrician suffered burns from an electrical arc/blast when a pre-existing condition in a power distribution pan
3、el ultimately led to a ground fault in a 3-phase 480-volt power supply. The pre-existing condition was believed to be an access panel fastener that had penetrated conductor insulation. A contributing factor to this incident was the lack of work access history. This was tracked ultimately to the loss
4、 of maintenance data during support contract turnover. Maintenance schedules and data were not routinely obtained by the Government at contract termination. While JSC has been in existence since the mid-1960s, only the past two and a half years of maintenance history were readily available. The only
5、 record of past testing of the breaker was a test certification sticker from the time of installation ten years before the mishap. Records were not available to indicate preventative maintenance had been performed on this breaker. During a ten-year period, there were two occasions when the cables wo
6、uld have been disconnected from the breaker, so that the main breaker could have been removed for testing. As part of these Two opportunities for maintenance, the incoming cables where the fault occurred would have been recognized and corrected (moved and/or repositioned), increasing the likelihood
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