NASA-LLIS-0875

NASA - National Aeronautics and Space Administration (NASA)

Lessons Learned – Implementation of Sensors and Warning Devices to Detect Out-of-Tolerance Conditions

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NASA - National Aeronautics and Space Administration (NASA)

Year: 2000

Abstract: Description of Driving Event:
On May 16, 1994, an AMDAHL 5995M mainframe computer overheated at approximately 8:20 AM in the Software Production Facility (SPF) in Building 30 at JSC. Physical damage to the computer due to this overheat was estimated at $669,000. This overheat occurred due to an inadvertent miswiring of a circuit breaker after a routine power outage and maintenance of the breaker. The quality inspection failed to check for the proper rewiring of the circuit breaker. The miswiring caused a phase rotation of the power, which in turn caused fans cooling the AMDAHL 2550 to turn backwards. Power isolation and monitoring equipment that could have prevented any impact from the phase rotation was not properly utilized. This led to insufficient cooling of the AMDAHL 2550 which resulted in the overheat and subsequent damage.

URI: http://yse.yabesh.ir/std/handle/yse/157116

Subject: Administration/Organization

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NASA - National Aeronautics and Space Administration (NASA)

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contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T17:34:13Z
date available	2017-09-04T17:34:13Z
date copyright	02/29/2000
date issued	2000
identifier other	DETEQCAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std/handle/yse/157116
description abstract	Description of Driving Event: On May 16, 1994, an AMDAHL 5995M mainframe computer overheated at approximately 8:20 AM in the Software Production Facility (SPF) in Building 30 at JSC. Physical damage to the computer due to this overheat was estimated at $669,000. This overheat occurred due to an inadvertent miswiring of a circuit breaker after a routine power outage and maintenance of the breaker. The quality inspection failed to check for the proper rewiring of the circuit breaker. The miswiring caused a phase rotation of the power, which in turn caused fans cooling the AMDAHL 2550 to turn backwards. Power isolation and monitoring equipment that could have prevented any impact from the phase rotation was not properly utilized. This led to insufficient cooling of the AMDAHL 2550 which resulted in the overheat and subsequent damage.
language	English
title	NASA-LLIS-0875	num
title	Lessons Learned – Implementation of Sensors and Warning Devices to Detect Out-of-Tolerance Conditions	en
type	standard
page	3
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;2000
contenttype	fulltext
subject keywords	Administration/Organization
subject keywords	Communication Systems
subject keywords	Computers
subject keywords	Configuration Management
subject keywords	Emergency Preparedness
subject keywords	Energy
subject keywords	Environment
subject keywords	Facilities
subject keywords	Ground Equipment
subject keywords	Ground Operations
subject keywords	Hardware
subject keywords	Industrial Operations
subject keywords	Information Technology/Systems
subject keywords	Occupational Health
subject keywords	Policy & Planning
subject keywords	Risk Management/Assessment
subject keywords	Safety & Mission Assurance
subject keywords	Security
subject keywords	Test & Verification
subject keywords	Test Article
subject keywords	Test Facility
subject keywords	Training Equipment