NASA-LLIS-0125

Lessons Learned - Orbiter Compartment Overpressurization

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T16:24:46Z
date available	2017-09-04T16:24:46Z
date copyright	08/21/1992
date issued	1992
identifier other	TVYCQCAAAAAAAAAA.pdf
identifier uri	https://yse.yabesh.ir/std/handle/yse/88024
description abstract	Description of Driving Event: The portable purge unit supplies conditioned air through ducts to the orbiter to purge and/or pressurize the payload bay's forward and aft compartments. Airflow varies between 50 lbs/min minimum to 100 lbs/min maximum. Vent door observers are always on station when a vent door is repositioned for a test or TPS tile/thermal barrier work. Overpressurization may occur if all the orbiter vent doors (normally in the purge position) for a compartment are closed at one time. Control logic program VAM09 also notifies the firing room engineers if both a right hand and left hand purge vent door set is closed.
language	English
title	NASA-LLIS-0125	num
title	Lessons Learned - Orbiter Compartment Overpressurization	en
type	standard
page	2
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1992
contenttype	fulltext
subject keywords	Ground Operations
subject keywords	Launch Vehicle