REG NASA-LLIS-1198-1990 Lessons Learned Payload Hazardous Servicing Facility (PHSF) Water Deluge System Close Call Investigation Final Report.pdf
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1、Lessons Learned Entry: 1198Lesson Info:a71 Lesson Number: 1198a71 Lesson Date: 1990-07-26a71 Submitting Organization: KSCa71 Submitted by: Robert Luken/ Eric RaynorSubject: Payload Hazardous Servicing Facility (PHSF) Water Deluge System Close Call Investigation Final Report Description of Driving Ev
2、ent: On July 26, 1990, 14:06 EDT, a Payload Hazardous Servicing Facility (PHSF) fire alarm indication was received at the Protective Services Control Center (PSCC) in the Launch Control Center (LCC). Fire services responded and found no alarm indications at the facility. Initial troubleshooting by E
3、G telephone and handset communication are not recorded. There seemed to be no distinction in trouble-shooting methods employed for critical vs. non-critical circuits.Water Deluge System: 1. Drawings: The system schematics of the Water Deluge System at the PHSF did not reflect Provided by IHSNot for
4、ResaleNo reproduction or networking permitted without license from IHS-,-,-that the control lines between the Control Building (M7-1357) and the Service Building (M7-1354) were routed through comm. system Frames. They incorrectly showed direct dedicated lines between the buildings2. Separation: The
5、“ARM it is accessible for work or troubleshooting by people with no knowledge of the presence of criticality of the Water Deluge circuitry.4. Monitoring: The Water Deluge control logic is designed and implemented such that there is no monitoring or traceability of which panel and/or pushbutton was a
6、ctuated. Therefore it is impossible to tell if the system was actuated by a malfunction of by a switch actuation.5. Other Facilities: There are at least 15 other facilities with the Water Deluge Systems utilizing remote control panels. There is a high probability that these systems are implemented t
7、hat same as the PHSF system.Contractor Interface: Fragmentation of the fire Protection systems prevent the individual contractors and their NASA counterparts from understanding the overall system and how their part of the system may affect the whole. Recommendation(s): Communication System: 1. Frame
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