NASA-LLIS-2856

Lessons Learned – Re-Certifying An Umbilical After A Modification

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T18:11:24Z
date available	2017-09-04T18:11:24Z
date copyright	06/20/2010
date issued	2010
identifier other	GZPSTCAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/194368
description abstract	Abstract: The flight element design agency modified the design of the External Tank Ground Umbilical Carrier Plate, which is used to vent hydrogen. The design changes were considered minor enough that modeling and simulation were deemed sufficient to certify the part for use. During STS-114 launch operations, a camera recorded a cryogenic liquid leaking from the shroud used for purging the umbilical. Because oxygen liquefies before nitrogen, the evidence of liquid caused a concern that oxygen was liquefying from air and posing a risk to launch operation safety.
language	English
title	NASA-LLIS-2856	num
title	Lessons Learned – Re-Certifying An Umbilical After A Modification	en
type	standard
page	2
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;2010
contenttype	fulltext
subject keywords	Cryogenic Systems
subject keywords	Engineering design and project processes and standards
subject keywords	Ground support systems
subject keywords	Launch support systems
subject keywords	Launch Systems