1、Lessons Learned Entry: 0357Lesson Info:a71 Lesson Number: 0357a71 Lesson Date: 1994-12-13a71 Submitting Organization: JPLa71 Submitted by: J. LangmaierSubject: Galileo Slip Ring Cleaning Problem Abstract: During the process of cleaning the Galileo slip rings, the PCA cleaning fluid obtained from JPL
2、 stores was found to contain chemical and particulate contaminants. When cleaning critical spacecraft components, the cleaning fluid should be carefully checked, not just visually, for chemical and particulate contaminants prior to use.Description of Driving Event: During the process of cleaning the
3、 Galileo slip rings, the PCA cleaning fluid obtained from JPL stores was found to contain chemical and particulate contaminants.Lesson(s) Learned: Cleaning fluid, obtained from approved sources and assumed to be “pure“, may in fact contain chemical and/or particulate contaminants.Recommendation(s):
4、When cleaning critical spacecraft components, the cleaning fluid should be carefully checked, not just visually, for chemical and particulate contaminants prior to use. The source of the contaminants could be the container or the manufacturing process or both.Evidence of Recurrence Control Effective
5、ness: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Ground Operationsa71 Industrial Operationsa71 Parts Materials & ProcessesAdditional Info: Approval Info: a71 Approval Date: 1986-06-25a71 Approval Name: Carol Dumaina71 Approval Organization: 125-204a71 Approval Phone Number: 818-354-8242Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
