NASA-LLIS-0094

Lessons Learned - Thruster Purge Operations

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T17:55:53Z
date available	2017-09-04T17:55:53Z
date copyright	07/30/1992
date issued	1992
identifier other	FKYCQCAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/178997
description abstract	Description of Driving Event: During removal of the purge adapter from thruster R4D, liquid MMH was observed leaking from the thruster nozzle. When the leak was discovered the OPF high bay hypergolic exhaust fans were actuated, the high bay evacuated, and fire and medical support were requested to stand by. The leaking MMH was caused by a liquid trap present in the fuel suction hose. The trap was formed by excessive hose length, which was routed to the next level above, then down to the purge adapter. The routing and hose length was left over from a previous operation on the left side of the orbiter.
language	English
title	NASA-LLIS-0094	num
title	Lessons Learned - Thruster Purge Operations	en
type	standard
page	2
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1992
contenttype	fulltext
subject keywords	Energetic Materials - Explosive/Propellant/Pyrotechnic
subject keywords	Flight Equipment
subject keywords	Hardware
subject keywords	Launch Vehicle
subject keywords	Pressure Vessels