NASA-LLIS-0152

Lessons Learned - Reaction Control System (RCS) Primary Thruster Plug Assembly

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T18:12:13Z
date available	2017-09-04T18:12:13Z
date copyright	33885
date issued	1992
identifier other	HBZCQCAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/195253
description abstract	Description of Driving Event: The RCS primary thruster throat ferry flight plug assembly is used to prevent moisture intrusion during the orbiter's ferry operations. This assembly is installed after the orbiter lands and is removed during deservicing operations. After deservicing, the primary engine cover is used during orbiter processing to control and/or prevent moisture. This cover has a butyl rubber o-ring which acts as a moisture seal, but is incompatible with N2O4. Vapor leakage could cause deterioration of the o-ring, severely limiting the effectiveness of the thruster ferry plug to seal out moisture, as well as contaminating the thruster nozzle.
language	English
title	NASA-LLIS-0152	num
title	Lessons Learned - Reaction Control System (RCS) Primary Thruster Plug Assembly	en
type	standard
page	2
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1992
contenttype	fulltext
subject keywords	Hardware
subject keywords	Parts Materials & Processes