REG NASA-LLIS-0444--1993 Lessons Learned - Electrical Connectors.pdf

1、Lessons Learned Entry: 0444Lesson Info:a71 Lesson Number: 0444a71 Lesson Date: 1993-07-30a71 Submitting Organization: LERCa71 Submitted by: G. MichalsonSubject: Electrical Connectors Description of Driving Event: During mating of the Magellan Spacecraft connectors within the forward equipment module

2、 (a confined space with limited visibility), the technician observed sparks, flames, and smoke. The primary cause was the inadvertent mating of at least two pins of the spacecraft harness connector P2 to connector J3 of Battery 1. The mismate of these connectors created an electrical short circuit w

3、ithin the J3 connector that, using the energy stored in the battery, produced the damage on Battery 1, connector P2 and the battery thermal blanket.Lesson(s) Learned: Differently keyed connector halves can be partially mated and cause arcing and short circuiting.Recommendation(s): Use scoop-proof co

4、nnectors for future applications where interchangeability is possible and provide for greater visibility of battery connectors to prevent mismate.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted with

5、out license from IHS-,-,-Mission Directorate(s): N/AAdditional Key Phrase(s): a71 Energya71 Hardwarea71 Parts Materials & ProcessesAdditional Info: Approval Info: a71 Approval Date: 1996-09-13a71 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-,-,-