NASA-LLIS-0001

Lessons Learned - Implementation of Procedural Controls in Additional Procedures Beyond the Procedure Under Investigation and Correction

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T18:11:53Z
date available	2017-09-04T18:11:53Z
date copyright	04/10/1991
date issued	1991
identifier other	HAYCQCAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/194860
description abstract	Description of Driving Event: During prelaunch check out of shuttle orbiter OV-104 for flight STS-36, the AC2 buss phase a voltage fluctuated between 112 and 122V for one minute. The inverter supplying that buss was removed and replaced. The vendors' inspection of the failed inverter found loose mounting screws on the electrical buss internal to the inverter, which caused the voltage fluctuations. An identical problem had been previously discovered that prompted a change to the manufacturing procedures to include a specified torque for the mounting screws. The failed flight unit had been reworked, but the manufacturing procedural change had not been incorporated into the rework process.
language	English
title	NASA-LLIS-0001	num
title	Lessons Learned - Implementation of Procedural Controls in Additional Procedures Beyond the Procedure Under Investigation and Correction	en
type	standard
page	2
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1991
contenttype	fulltext
subject keywords	Configuration Management
subject keywords	Flight Equipment
subject keywords	Hardware