1、Lessons Learned Entry: 0470Lesson Info:a71 Lesson Number: 0470a71 Lesson Date: 1994-07-22a71 Submitting Organization: LERCa71 Submitted by: Maria HavenhillSubject: Electrical Connectors - Scout Program Description of Driving Event: Various times throughout 1960-1975, functional problems were encount
2、ered because a set of connectors were unmated or contacts in the connector were deformed as a result of misalignment during mating.The unmated connector condition was the result of deviating from normal processing. Break of inspection sheets were added to applicable logbooks to alert test technician
3、s and engineers of the unmated connectors. When the connector was remated, the condition was verified on the break of inspection sheet.Deformed contacts were often the result of slightly bent pins or the misalignment of pin and socket at the time of mating. Tapered socket entry reduced this problem.
4、 Misalignment of replaceable contacts was sometimes caused by wire routing at the rear end of the connector. If inspectors had performed a visual examination of both connectors prior to mating, misalignment of contacts would have been greatly reduced.Further information can also be obtained by conta
5、cting the Reliability and Quality Division of Loral Vought Systems at P.O. Box 650003, Dallas, TX, 75265-0003 or calling (214) 603-1000.Lesson(s) Learned: Unmated or mismated electrical connectors can be the cause of functional problems.Recommendation(s): 1. Minimize connector cycling.Provided by IH
6、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2. Visually re-inspect connectors prior to mating.3. Verify that all applicable connectors have been mated prior to proceeding with testing.4. Tapered socket entry should be considered as a feature of the connector d
7、esign.Evidence of Recurrence Control Effectiveness: Possible failures were reduced because the contact alignment condition cannot be visually verified after mating, and functional tests may not always detect bent pin problems, such as electrical shorts to other circuits.Documents Related to Lesson:
8、N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Hardwarea71 Parts Materials & ProcessesAdditional Info: Approval Info: a71 Approval Date: 1996-11-01a71 Approval Name: Sell Jamesa71 Approval Organization: 501-4a71 Approval Phone Number: 216-433-8618Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
